1
00:00:19,394 --> 00:00:21,521
‎六萬年前

2
00:00:22,147 --> 00:00:25,608
‎人類首次離開非洲

3
00:00:30,697 --> 00:00:33,408
‎從此我們不曾停步

4
00:00:34,325 --> 00:00:37,162
‎到訪地球每個角落

5
00:00:40,040 --> 00:00:43,543
‎但我們的旅程不過是眾多旅程之一

6
00:00:44,711 --> 00:00:46,296
‎在任何時候

7
00:00:47,213 --> 00:00:50,467
‎都有億萬動物在移動

8
00:00:54,220 --> 00:00:57,932
‎這對我們星球的健康至關重要

9
00:01:02,687 --> 00:01:06,649
‎劇名：我們的星球 2

10
00:01:18,703 --> 00:01:23,666
‎遷徙是最為重要的生存策略

11
00:01:28,338 --> 00:01:29,589
‎對餵哺如是‎…

12
00:01:32,175 --> 00:01:33,176
‎對繁殖如是

13
00:01:34,928 --> 00:01:36,471
‎對尋找新家亦如是

14
00:01:43,561 --> 00:01:46,022
‎而遷徙並非毫無風險

15
00:01:55,115 --> 00:01:58,952
‎本片描繪了

16
00:01:59,035 --> 00:02:03,039
‎日益多變世界裏的非凡旅程

17
00:02:07,460 --> 00:02:11,047
‎直到現在，我們才開始理解

18
00:02:12,132 --> 00:02:14,050
‎地球上一切生物

19
00:02:15,552 --> 00:02:19,055
‎都需要依賴移動的自由

20
00:02:28,898 --> 00:02:32,735
‎（第一章 移動的世界）

21
00:02:45,165 --> 00:02:49,502
‎每年，波札那的這片土地
‎都會改頭換面

22
00:02:52,463 --> 00:02:56,885
‎這些凹痕
‎是土地曾被水覆蓋的僅有證據

23
00:02:56,968 --> 00:02:58,678
‎那不過是三個月前的事

24
00:03:03,766 --> 00:03:06,019
‎那時，茂綠如茵

25
00:03:07,937 --> 00:03:10,773
‎此時，苦焦貧瘠

26
00:03:19,949 --> 00:03:24,287
‎這種轉變驅使動物集體遷移

27
00:03:39,427 --> 00:03:43,723
‎非洲水牛齊步橫越卡拉哈里沙漠

28
00:03:43,806 --> 00:03:46,517
‎向最後的水源進發

29
00:03:54,192 --> 00:03:58,571
‎各牛群聚集成大軍

30
00:04:09,249 --> 00:04:11,084
‎陣容之大，冠絕非洲

31
00:04:21,636 --> 00:04:25,390
‎大家都在參與同一趟年度朝聖之旅

32
00:04:26,432 --> 00:04:28,977
‎向一個遙遠的沼澤邁進

33
00:04:35,942 --> 00:04:39,195
‎別的動物則指望他們如此行動

34
00:04:42,949 --> 00:04:46,536
‎這些獅子是獵捕水牛的專家

35
00:04:53,084 --> 00:04:55,336
‎而水牛大軍的來臨

36
00:04:55,420 --> 00:04:58,589
‎對牠們而言，是每年最大的盛事

37
00:05:02,093 --> 00:05:06,306
‎幾星期來，他們一直等待水牛大軍

38
00:05:09,642 --> 00:05:13,646
‎金睛火眼盯着每個跨越地平線的身影

39
00:05:35,626 --> 00:05:36,878
‎終於等到了

40
00:05:52,435 --> 00:05:56,981
‎逐漸逼近的大軍
‎像一道牛角與肌肉交織的牆

41
00:06:10,411 --> 00:06:13,373
‎但獅子必須找到漏洞

42
00:06:31,224 --> 00:06:32,975
‎而這可能就是了

43
00:06:34,018 --> 00:06:35,520
‎一頭落單的公牛

44
00:06:37,313 --> 00:06:39,565
‎即使牠與族群分離

45
00:06:39,649 --> 00:06:42,735
‎但牠比一頭獅子重四倍

46
00:06:43,319 --> 00:06:46,614
‎亦是非洲最危險的動物之一

47
00:06:49,075 --> 00:06:51,702
‎獅群必須謹慎靠近

48
00:07:01,295 --> 00:07:05,299
‎牠們逐一不經意地走向水牛

49
00:07:06,217 --> 00:07:08,761
‎假裝沒有興趣捕獵

50
00:07:20,815 --> 00:07:24,110
‎事實上，他們正在各就各位

51
00:08:13,409 --> 00:08:16,412
‎母獅輪流攻擊‎…

52
00:08:22,084 --> 00:08:23,544
‎消耗公牛的體力

53
00:08:34,722 --> 00:08:37,934
‎此時，體型較重的雄獅加入戰圈

54
00:09:13,052 --> 00:09:16,180
‎獅群把技術磨練得高超非常

55
00:09:16,931 --> 00:09:18,724
‎短短三分鐘內

56
00:09:19,934 --> 00:09:23,604
‎牠們已擊敗最強大的對手

57
00:09:33,614 --> 00:09:36,409
‎獅子賴以為生的這趟遷徙

58
00:09:36,492 --> 00:09:39,704
‎乃季節更替帶動的數百萬趟遷徙之一

59
00:09:40,830 --> 00:09:42,540
‎而這些遷徙行動

60
00:09:43,165 --> 00:09:45,585
‎則是另一趟旅程的結果

61
00:09:46,586 --> 00:09:50,298
‎我們的星球一年一圈圍繞太陽轉動

62
00:09:54,093 --> 00:09:55,386
‎地球轉動時

63
00:09:55,469 --> 00:10:00,474
‎會傾斜23.5度

64
00:10:03,728 --> 00:10:06,772
‎這正創造了我們的季節

65
00:10:09,650 --> 00:10:14,030
‎要了解箇中原理，請將目光投向北極

66
00:10:16,490 --> 00:10:19,994
‎有半年的時間，北極偏離日照角度

67
00:10:20,578 --> 00:10:23,039
‎籠罩在黑暗與寒冬之中

68
00:10:28,085 --> 00:10:31,964
‎餘下的半年，北極迎向太陽

69
00:10:32,757 --> 00:10:34,717
‎白晝變長

70
00:10:42,975 --> 00:10:45,311
‎這個每年一度的循環

71
00:10:45,394 --> 00:10:48,898
‎驅動地球上最重大的生物流動

72
00:10:51,734 --> 00:10:56,864
‎而在北半球
‎這也帶來了一年之中最大的轉變

73
00:10:59,533 --> 00:11:00,576
‎春天

74
00:11:03,204 --> 00:11:09,460
‎（三月）

75
00:11:11,045 --> 00:11:15,841
‎三月底
‎白天延長的速度比任何時候都快

76
00:11:20,554 --> 00:11:24,350
‎日照增加，迅速提升地面溫度

77
00:11:26,102 --> 00:11:27,812
‎引發暴風雨

78
00:11:29,855 --> 00:11:33,067
‎北半球突然變暖

79
00:11:34,360 --> 00:11:35,361
‎亦更潮濕

80
00:11:37,780 --> 00:11:39,281
‎非常適合植物生長

81
00:11:47,832 --> 00:11:50,459
‎大地披上綠色

82
00:11:55,506 --> 00:12:01,303
‎有一種動物
‎最能善用植物繁茂滋長之利

83
00:12:08,811 --> 00:12:10,229
‎一星期前

84
00:12:10,312 --> 00:12:12,606
‎這種埃塞俄比亞的沙漠蝗蟲

85
00:12:13,315 --> 00:12:17,278
‎還是害羞含蓄，形單影隻，甚少活動

86
00:12:21,824 --> 00:12:23,451
‎俱往矣

87
00:12:30,166 --> 00:12:32,710
‎當食源暴增

88
00:12:33,419 --> 00:12:36,672
‎蝗蟲轉而進入蜂擁模式

89
00:12:40,384 --> 00:12:41,927
‎開始齊步行進

90
00:12:42,678 --> 00:12:45,306
‎成員數目以快十倍的速度增長

91
00:12:54,148 --> 00:12:55,900
‎隨着其數量激增

92
00:12:55,983 --> 00:12:58,194
‎牠們將所到之地一掃而空

93
00:13:02,448 --> 00:13:05,409
‎因此，為尋找更多食物

94
00:13:05,493 --> 00:13:08,245
‎牠們必須持續移動

95
00:13:26,514 --> 00:13:28,307
‎蟲群不斷擴充

96
00:13:32,728 --> 00:13:34,230
‎壯大

97
00:13:38,651 --> 00:13:41,862
‎吞噬行經之地的所有植物

98
00:13:45,157 --> 00:13:47,159
‎然而這只是個開始

99
00:13:49,036 --> 00:13:52,289
‎單靠走路，遷移的距離十分有限

100
00:13:55,376 --> 00:13:56,502
‎要去得更遠

101
00:13:58,087 --> 00:14:00,256
‎牠們必須改變形態

102
00:14:12,226 --> 00:14:14,228
‎牠們長出翅膀

103
00:14:36,166 --> 00:14:39,086
‎現在胃口更大了

104
00:14:39,670 --> 00:14:42,756
‎整個軍隊飛上雲霄

105
00:14:51,974 --> 00:14:52,850
‎牠們一邊進食‎…

106
00:14:54,852 --> 00:14:56,020
‎一邊飛翔

107
00:15:01,942 --> 00:15:02,902
‎一邊進食‎…

108
00:15:04,945 --> 00:15:05,988
‎一邊飛翔

109
00:15:13,996 --> 00:15:17,207
‎牠們匯聚成超級大軍

110
00:15:18,375 --> 00:15:20,794
‎數目有二千億之多

111
00:15:23,005 --> 00:15:26,175
‎這是70年間出現過最龐大的一群

112
00:15:30,471 --> 00:15:34,516
‎大軍消耗四十萬公噸食物

113
00:15:34,600 --> 00:15:36,477
‎每天如是

114
00:15:40,648 --> 00:15:43,609
‎因此，若要全部成員都吃得飽

115
00:15:43,692 --> 00:15:46,612
‎大軍就必須移動得更遠更快

116
00:15:54,954 --> 00:15:57,581
‎大軍每天行進100公里

117
00:15:57,665 --> 00:16:00,292
‎跨越農地與城鎮

118
00:16:10,970 --> 00:16:13,973
‎大軍席捲一個又一個國家‎…

119
00:16:16,350 --> 00:16:18,394
‎而最驚人的是

120
00:16:18,477 --> 00:16:20,896
‎大軍甚至跨越紅海

121
00:16:23,857 --> 00:16:27,069
‎（巴基斯坦）

122
00:16:27,152 --> 00:16:32,741
‎這是首次有蝗蟲大軍
‎征服喜馬拉雅山並抵達西藏

123
00:16:37,871 --> 00:16:39,498
‎大軍所到之處

124
00:16:41,375 --> 00:16:42,960
‎皆混亂一片

125
00:16:54,346 --> 00:16:58,976
‎大軍會持續移動
‎直至季節更替帶來乾旱

126
00:17:01,311 --> 00:17:04,023
‎因為當牠們的糧食終於消失‎…

127
00:17:06,817 --> 00:17:08,235
‎牠們亦會隨之消逝

128
00:17:15,909 --> 00:17:19,413
‎（四月）

129
00:17:19,496 --> 00:17:24,293
‎四月份，北方的日照時間繼續延長

130
00:17:26,712 --> 00:17:30,799
‎日光增加，使海洋變暖

131
00:17:30,883 --> 00:17:33,594
‎造成大範圍藻華

132
00:17:33,677 --> 00:17:36,180
‎食物亦突然變得充足

133
00:17:39,600 --> 00:17:42,728
‎對某種動物而言
‎這正是踏上旅途之時

134
00:17:51,653 --> 00:17:55,908
‎卑詩省附近一個偏避小島的午夜

135
00:17:59,328 --> 00:18:00,370
‎地底下‎…

136
00:18:02,456 --> 00:18:04,041
‎有什麼東西在動

137
00:18:11,507 --> 00:18:15,886
‎這隻扁嘴海雀雛鳥才剛破殼而出

138
00:18:17,805 --> 00:18:22,101
‎卻即將面對畢生最艱辛的旅程

139
00:18:25,729 --> 00:18:27,731
‎牠尚未吃第一餐

140
00:18:28,607 --> 00:18:30,609
‎急需食物

141
00:18:34,196 --> 00:18:35,823
‎媽媽來聯絡了

142
00:18:40,619 --> 00:18:44,331
‎小島各處的飢餓雛鳥
‎從牠們的洞穴冒出來

143
00:18:46,041 --> 00:18:48,210
‎追隨父母的呼喚而去

144
00:18:50,587 --> 00:18:53,340
‎但牠們若期待立刻進食

145
00:18:54,341 --> 00:18:56,301
‎就必將失望

146
00:19:02,141 --> 00:19:04,393
‎扁嘴海雀是唯一一種

147
00:19:04,935 --> 00:19:07,938
‎只在海洋餵食的海鳥

148
00:19:10,232 --> 00:19:13,026
‎雛鳥必須到那裏去

149
00:19:15,362 --> 00:19:17,197
‎牠們還不會飛

150
00:19:17,781 --> 00:19:19,867
‎所以要到海洋去

151
00:19:20,784 --> 00:19:22,035
‎牠們只能用走的

152
00:19:29,585 --> 00:19:33,589
‎等待入夜躲避捕食者固然合理

153
00:19:34,381 --> 00:19:37,676
‎看路卻也更加困難

154
00:19:45,267 --> 00:19:48,103
‎當身體比高爾夫球大不了多少

155
00:19:49,062 --> 00:19:50,981
‎任何東西都可能成為障礙

156
00:19:56,904 --> 00:20:00,407
‎阻擋牠們去路的
‎也許是最低矮的樹幹‎…

157
00:20:02,534 --> 00:20:04,912
‎或是最細小的河流

158
00:20:10,000 --> 00:20:13,879
‎對部分雛鳥而言
‎旅程尚未開始就已終結

159
00:20:22,137 --> 00:20:24,306
‎但這隻雛鳥不一樣

160
00:20:28,060 --> 00:20:30,020
‎終於來到海灘

161
00:20:31,313 --> 00:20:35,692
‎這是牠未來兩年最後觸碰的土地

162
00:20:41,323 --> 00:20:42,449
‎為尋找母親

163
00:20:42,950 --> 00:20:45,077
‎牠在黑暗中叫喚

164
00:21:00,008 --> 00:21:01,426
‎重聚了

165
00:21:04,888 --> 00:21:07,516
‎但這隻雛鳥仍未進餐

166
00:21:12,604 --> 00:21:16,149
‎為取得距離最近的食物
‎牠們不停划水前行

167
00:21:17,943 --> 00:21:21,363
‎旅程長達70公里

168
00:21:27,995 --> 00:21:30,539
‎在這裏，母親終於能潛進水中

169
00:21:30,622 --> 00:21:33,583
‎為雛鳥取來第一頓磷蝦盛宴

170
00:21:34,793 --> 00:21:37,170
‎但這只是中途補給站

171
00:21:39,881 --> 00:21:43,427
‎兩隻鳥兒繼續划水
‎又前行了一千公里

172
00:21:46,430 --> 00:21:50,350
‎這趟遷徙為期一個月
‎目的地是北方的富饒海域

173
00:21:50,434 --> 00:21:51,810
‎在那裏，牠們可以大快朵頤

174
00:21:53,437 --> 00:21:58,400
‎這大概是初生鳥兒經歷的旅程中
‎最為漫長的一趟

175
00:22:04,740 --> 00:22:07,743
‎而由於夏季的海洋如此豐饒

176
00:22:08,702 --> 00:22:13,457
‎這些海雀幾乎可以終身居於海上

177
00:22:19,838 --> 00:22:25,552
‎（五月）

178
00:22:26,470 --> 00:22:30,057
‎在夏威夷西北1600公里外

179
00:22:31,183 --> 00:22:33,727
‎有一小片偏僻的土地

180
00:22:35,437 --> 00:22:36,480
‎雷仙島

181
00:22:40,692 --> 00:22:44,321
‎以此為家的包括世上最大的海鳥之一

182
00:22:48,700 --> 00:22:50,911
‎黑背信天翁

183
00:22:55,791 --> 00:22:58,543
‎這隻六星期大的雛鳥

184
00:22:58,627 --> 00:23:02,422
‎將成為超凡長途旅者

185
00:23:04,299 --> 00:23:09,513
‎在60年的生命中飛越幾百萬公里

186
00:23:11,181 --> 00:23:13,892
‎可是現在，牠才四個月大

187
00:23:13,975 --> 00:23:15,727
‎仍然未能飛翔

188
00:23:16,561 --> 00:23:18,522
‎哪裏都去不了

189
00:23:23,527 --> 00:23:24,945
‎有別於扁嘴海雀

190
00:23:25,028 --> 00:23:27,572
‎牠指望父母

191
00:23:28,156 --> 00:23:29,491
‎把食物帶來給牠

192
00:23:32,577 --> 00:23:36,456
‎但牠的父母或遠在3000公里外捕魚

193
00:23:37,874 --> 00:23:40,252
‎由所以牠也許要等一等

194
00:23:42,003 --> 00:23:43,880
‎經歷滂沱大雨‎…

195
00:23:47,592 --> 00:23:49,136
‎盛怒狂風‎…

196
00:23:51,721 --> 00:23:53,765
‎還有如火高溫

197
00:24:03,316 --> 00:24:06,945
‎每隻跨越地平線的鳥都帶來希望

198
00:24:14,119 --> 00:24:15,328
‎來了一隻信天翁

199
00:24:18,540 --> 00:24:20,083
‎但品種不對

200
00:24:21,668 --> 00:24:22,961
‎是黑腳信天翁

201
00:24:25,297 --> 00:24:28,341
‎不過牠十之八九帶了食物來

202
00:24:31,386 --> 00:24:34,848
‎小黑背信天翁極度飢餓
‎索性碰碰運氣

203
00:24:42,272 --> 00:24:46,401
‎這位母親顯然家庭至上

204
00:24:59,748 --> 00:25:02,167
‎但看起來像救命之草的

205
00:25:03,418 --> 00:25:05,629
‎或許其實是死刑之仗

206
00:25:08,757 --> 00:25:12,344
‎小島各處都有雛鳥死亡

207
00:25:17,349 --> 00:25:20,685
‎現在塑膠充斥海洋

208
00:25:22,020 --> 00:25:26,149
‎甚至蔓延到地球上最偏遠的海島

209
00:25:27,359 --> 00:25:29,694
‎隨水流漂到此處

210
00:25:34,783 --> 00:25:40,330
‎海鳥誤將漂浮的碎塊當作食物
‎並帶回去給孩子

211
00:25:40,872 --> 00:25:42,916
‎結果意外害死牠們

212
00:25:47,629 --> 00:25:52,717
‎幾乎可以肯定
‎島上每隻雛鳥肚裏都有塑膠

213
00:25:55,220 --> 00:25:58,640
‎被餵食太多塑膠的雛鳥因饑餓而死

214
00:26:04,396 --> 00:26:07,607
‎黑背信天翁深陷重大危機

215
00:26:09,484 --> 00:26:13,238
‎牠們吃下的塑膠，比任何海鳥都多

216
00:26:14,573 --> 00:26:17,242
‎而且情況一年比一年嚴重

217
00:26:28,795 --> 00:26:31,840
‎終於，在海上逗留近三星期後‎…

218
00:26:34,050 --> 00:26:36,511
‎這隻雛鳥的父親回來了

219
00:26:46,187 --> 00:26:48,523
‎闊別那麼久

220
00:26:50,275 --> 00:26:52,861
‎牠們要重新培養感情

221
00:27:02,996 --> 00:27:07,000
‎這也許是雛鳥最後一次獲得餵食

222
00:27:09,419 --> 00:27:12,964
‎而食物幾乎肯定含有塑膠

223
00:27:26,978 --> 00:27:31,149
‎牠的父親重投浪跡大平洋的生活

224
00:27:32,984 --> 00:27:35,570
‎留下雛鳥自生自滅

225
00:27:38,990 --> 00:27:41,409
‎但對牠而言，事情尚未結束

226
00:27:44,788 --> 00:27:48,416
‎信天翁一般會吐出難以消化的部分

227
00:27:48,500 --> 00:27:50,960
‎例如烏賊嘴和骨頭

228
00:27:55,006 --> 00:28:00,595
‎但要吐出打火機和瓶蓋，則較為艱難

229
00:28:13,024 --> 00:28:14,234
‎但這隻雛鳥

230
00:28:16,152 --> 00:28:17,487
‎是位生存鬥士

231
00:28:21,825 --> 00:28:23,118
‎如此一來

232
00:28:23,201 --> 00:28:26,579
‎牠離起飛更近一步了

233
00:28:28,456 --> 00:28:31,084
‎幾星期內，順風的話

234
00:28:31,167 --> 00:28:34,462
‎牠將終能展翅首航

235
00:28:34,546 --> 00:28:37,757
‎躋身最強海洋旅者之列

236
00:28:44,931 --> 00:28:47,851
‎我們這顆傾斜行星穿越太空的軌跡

237
00:28:47,934 --> 00:28:50,979
‎對於一個地方的影響遠深於別處

238
00:28:51,855 --> 00:28:57,026
‎（六月）

239
00:28:57,110 --> 00:28:59,070
‎北方的夏季

240
00:29:02,615 --> 00:29:05,410
‎北極地帶受到太陽照射

241
00:29:05,493 --> 00:29:08,747
‎沐浴在永晝的日光中

242
00:29:08,830 --> 00:29:11,541
‎一片被冰覆蓋的海洋隨之融化

243
00:29:23,928 --> 00:29:26,097
‎要在這變化不斷的世界上存活

244
00:29:26,681 --> 00:29:29,350
‎生物必須採取相應行動

245
00:29:59,881 --> 00:30:03,760
‎這頭年幼北極熊的家年年鉅變

246
00:30:04,344 --> 00:30:07,055
‎使牠無法停駐於有限領地

247
00:30:11,184 --> 00:30:14,562
‎相反，牠必須浪遊數千公里

248
00:30:14,646 --> 00:30:16,231
‎以尋找海豹

249
00:30:28,785 --> 00:30:32,247
‎但每到夏季，當冰開始融化

250
00:30:33,623 --> 00:30:35,959
‎牠必須縮減步行的時間‎…

251
00:30:39,838 --> 00:30:41,506
‎而延長游泳的時間

252
00:30:48,012 --> 00:30:51,099
‎現在，牠每天要游近八小時

253
00:31:01,568 --> 00:31:05,697
‎他能嗅到30公里外的獵物

254
00:31:09,534 --> 00:31:13,955
‎所以知道這隻髯海豹就在附近

255
00:31:27,510 --> 00:31:30,263
‎海豹並未察覺到危險

256
00:31:32,557 --> 00:31:35,351
‎而北極熊須維持這狀態

257
00:32:16,601 --> 00:32:20,730
‎從水中捕獵的成功率很低

258
00:32:42,669 --> 00:32:45,588
‎也許第三次會有好運氣

259
00:33:38,891 --> 00:33:44,272
‎這頭小熊尚未掌握
‎從海裏靠近獵物的技藝

260
00:33:46,274 --> 00:33:48,359
‎但牠必須學會，這很重要

261
00:33:49,444 --> 00:33:52,905
‎牠或許會一年比一年更需要這技藝

262
00:33:58,536 --> 00:34:00,455
‎我們的氣候正在暖化

263
00:34:06,919 --> 00:34:09,881
‎受此影響最深之地

264
00:34:10,548 --> 00:34:12,050
‎正是北極地帶

265
00:34:16,054 --> 00:34:18,806
‎這一年，氣溫攀升

266
00:34:18,890 --> 00:34:22,769
‎高達攝氏38度，相當驚人‎…

267
00:34:26,564 --> 00:34:29,442
‎海冰以空前速度融化

268
00:34:32,862 --> 00:34:36,991
‎這對某種北極動物影響至深

269
00:34:47,251 --> 00:34:48,211
‎若要餵哺

270
00:34:48,294 --> 00:34:52,548
‎海象同時需要淺海牀

271
00:34:54,175 --> 00:34:55,843
‎大量蛤蜊

272
00:34:57,011 --> 00:35:00,765
‎以及供休息用的大塊浮冰

273
00:35:10,983 --> 00:35:14,195
‎然而，能去的地方越來越少了

274
00:35:17,448 --> 00:35:21,119
‎使夏季一年比一年難熬

275
00:35:22,787 --> 00:35:25,456
‎對新手母親尤甚

276
00:35:30,586 --> 00:35:35,466
‎三天前
‎牠不得不離開族群，獨自分娩

277
00:35:38,469 --> 00:35:42,014
‎從那時起，牠寸步不離幼象

278
00:35:53,985 --> 00:35:57,530
‎哺乳的母親所需的食物
‎幾乎是平日的兩倍

279
00:35:59,115 --> 00:36:03,286
‎但牠們卻不能丟下幼象，自己去進食

280
00:36:05,997 --> 00:36:08,875
‎所以牠必須找別的海象

281
00:36:09,792 --> 00:36:12,253
‎替牠照顧幼象

282
00:36:20,678 --> 00:36:24,140
‎小海象一出生就會游泳

283
00:36:28,561 --> 00:36:31,606
‎但牠還不夠強壯，未能遠行

284
00:36:35,151 --> 00:36:37,403
‎所以在首趟旅程中

285
00:36:38,529 --> 00:36:40,364
‎牠搭上了順風車

286
00:36:53,419 --> 00:36:55,630
‎隨着大浮冰逐年減少

287
00:36:55,713 --> 00:36:58,341
‎牠們必須游到更遠的地方求助

288
00:37:03,137 --> 00:37:06,766
‎在那之前，牠的母親將不能進食

289
00:37:15,274 --> 00:37:17,401
‎即使找到其他海象

290
00:37:17,944 --> 00:37:22,114
‎冰塊亦要低矮得能讓小象爬上去

291
00:37:26,869 --> 00:37:27,954
‎太高了

292
00:37:43,010 --> 00:37:44,720
‎這個看起來剛剛好

293
00:37:51,102 --> 00:37:53,854
‎但合適的浮冰供應短缺

294
00:37:53,938 --> 00:37:56,482
‎因此空間非常有限

295
00:38:17,461 --> 00:38:20,715
‎這並非牠們想要的歡迎

296
00:38:32,226 --> 00:38:34,687
‎即使有足夠的冰

297
00:38:34,770 --> 00:38:38,065
‎找不到幫手，牠還是無法進餐

298
00:38:38,649 --> 00:38:40,401
‎而是要和幼象待在一起

299
00:38:51,662 --> 00:38:53,789
‎牠們必須繼續找尋

300
00:38:56,375 --> 00:39:00,171
‎未來三年，幼象都會依賴牠

301
00:39:02,631 --> 00:39:04,216
‎無論牠去哪裏

302
00:39:05,051 --> 00:39:06,510
‎牠們都會同去

303
00:39:11,682 --> 00:39:16,312
‎夏季的海冰
‎有可能在未來十年徹底消失

304
00:39:24,403 --> 00:39:25,446
‎果真如此

305
00:39:25,529 --> 00:39:28,783
‎即使是北極地帶最富經驗的旅者

306
00:39:29,367 --> 00:39:31,619
‎亦可能再也無處可去

307
00:39:46,801 --> 00:39:48,302
‎六月底

308
00:39:48,386 --> 00:39:52,348
‎北方感受到地球傾斜的全盤影響

309
00:39:53,224 --> 00:39:56,936
‎並接收比任何時候都多的日光

310
00:39:58,270 --> 00:40:00,773
‎而這在太平洋某個角落

311
00:40:00,856 --> 00:40:04,193
‎造就了一年之中的絕佳機遇

312
00:40:12,368 --> 00:40:13,536
‎六個月來

313
00:40:13,619 --> 00:40:18,040
‎阿拉斯加的白令海
‎看來了無生氣，空洞一片

314
00:40:32,596 --> 00:40:34,682
‎然後，在六月的某一天‎…

315
00:40:37,184 --> 00:40:39,395
‎一切都變了

316
00:40:43,482 --> 00:40:45,359
‎座頭鯨經過一個月的旅程

317
00:40:46,193 --> 00:40:48,195
‎到達此處‎…

318
00:40:52,283 --> 00:40:55,995
‎參與鯨曆中的頭號盛事

319
00:40:58,414 --> 00:40:59,999
‎數以千計的座頭鯨

320
00:41:03,002 --> 00:41:04,670
‎太平洋各處

321
00:41:04,753 --> 00:41:07,256
‎其他旅者亦正在途上

322
00:41:09,884 --> 00:41:13,095
‎灰鸌競相趕路，務求準時抵達‎…

323
00:41:17,099 --> 00:41:20,686
‎每天飛行1000公里，不眠不休

324
00:41:23,063 --> 00:41:25,191
‎這次盛會事關重大

325
00:41:25,274 --> 00:41:27,943
‎牠們甚至不辭辛苦
‎自世界另一端遠道而來

326
00:41:30,529 --> 00:41:32,907
‎全長六萬五千公里

327
00:41:33,407 --> 00:41:36,911
‎這是地球上動物遷徙的最遠距離

328
00:41:43,584 --> 00:41:46,212
‎上百萬隻鳥加入鯨魚的隊伍

329
00:41:54,345 --> 00:41:56,430
‎全都是為捕食而來

330
00:42:06,690 --> 00:42:10,986
‎這是地球上最盛大的生物聚會之一

331
00:42:15,824 --> 00:42:17,785
‎五個月前的此處

332
00:42:18,285 --> 00:42:21,205
‎每天的日照只有七小時

333
00:42:23,958 --> 00:42:26,627
‎現在則有17小時

334
00:42:29,171 --> 00:42:34,218
‎這種轉變
‎引致浮游生物和磷蝦的數量暴漲

335
00:42:36,387 --> 00:42:41,517
‎對鯨魚而言
‎現在或許是一年之中唯一的進食機會

336
00:42:43,644 --> 00:42:44,603
‎整個夏季

337
00:42:45,604 --> 00:42:49,775
‎每條鯨魚均吞掉900公噸食物

338
00:42:59,410 --> 00:43:03,539
‎牠們都只有90天時間盡量進食

339
00:43:09,295 --> 00:43:11,297
‎很快，白天就會縮短

340
00:43:11,797 --> 00:43:14,466
‎使盛宴落幕

341
00:43:16,385 --> 00:43:19,305
‎然後，牠們全都會回到南方

342
00:43:22,141 --> 00:43:25,853
‎我們傾斜的星球
‎在旅程中帶來的機遇

343
00:43:25,936 --> 00:43:29,064
‎可謂巨大，卻也短暫

344
00:43:33,193 --> 00:43:35,779
‎在一個月的漫長夏日後

345
00:43:36,280 --> 00:43:39,825
‎北太平洋的溫度逼近頂峰

346
00:43:45,497 --> 00:43:48,542
‎某種海洋捕食動物察覺到變化

347
00:43:48,626 --> 00:43:50,669
‎並設定新航道

348
00:44:01,597 --> 00:44:02,931
‎一條虎鯊

349
00:44:03,432 --> 00:44:07,394
‎置身於長達一千公里
‎跨越太平洋的驚險旅程

350
00:44:14,526 --> 00:44:16,987
‎受地球磁場牽引

351
00:44:18,113 --> 00:44:21,367
‎牠直線游向目的地‎…

352
00:44:25,412 --> 00:44:27,414
‎雷仙島

353
00:44:30,042 --> 00:44:31,710
‎而牠並不孤單

354
00:44:36,090 --> 00:44:40,844
‎說到各類鯊魚的旅程距離之最
‎虎鯊的旅程榜上有名

355
00:44:43,389 --> 00:44:47,643
‎牠們捕食的動物種類
‎比任何鯊魚都要廣泛

356
00:44:49,269 --> 00:44:52,523
‎甚至包括鳥類

357
00:44:58,904 --> 00:45:02,408
‎自兩星期前遭父母遺棄後

358
00:45:02,491 --> 00:45:06,787
‎黑背信天翁雛鳥不曾進食

359
00:45:10,582 --> 00:45:11,792
‎為尋找食物

360
00:45:12,292 --> 00:45:15,045
‎牠必須離開海島

361
00:45:18,882 --> 00:45:23,679
‎但世上最大的海鳥需要很大升力

362
00:45:26,265 --> 00:45:28,642
‎助力可能隨時到臨

363
00:45:33,856 --> 00:45:39,570
‎七月份
‎海洋的高溫引發海上熱帶風暴‎…

364
00:45:43,991 --> 00:45:46,744
‎為雷仙島送風

365
00:45:47,911 --> 00:45:51,373
‎也為年幼信天翁帶來離境通行證

366
00:45:58,922 --> 00:46:01,049
‎微風持續增強

367
00:46:02,134 --> 00:46:05,804
‎直到連信天翁也足以升空

368
00:46:10,017 --> 00:46:14,646
‎黑腳信天翁總是帶頭啟程

369
00:46:30,204 --> 00:46:33,290
‎雛鳥的初航從不持久

370
00:46:37,920 --> 00:46:40,881
‎在此，這通常也是牠們最後的飛航

371
00:46:52,309 --> 00:46:55,687
‎虎鯊到達了

372
00:47:12,621 --> 00:47:14,498
‎牠們效率非常高

373
00:47:27,261 --> 00:47:32,015
‎信天翁雛鳥對此並不感到鼓舞

374
00:47:33,559 --> 00:47:34,518
‎但機不可失

375
00:47:35,894 --> 00:47:36,770
‎時不再來

376
00:47:46,905 --> 00:47:48,907
‎牠若飛抵外海

377
00:47:49,491 --> 00:47:53,453
‎就可能五年不會接觸陸地

378
00:47:55,706 --> 00:47:58,584
‎但這不容有失

379
00:48:07,843 --> 00:48:10,596
‎是時候放手一搏

380
00:48:13,974 --> 00:48:16,894
‎是時候展翅飛翔了

381
00:49:45,691 --> 00:49:48,568
‎字幕翻譯：Celine