[00:00:47]These vast floods accelerate the breakup.

这些洪流加速了浮冰解体

[00:05:48]Soon, an area of sea ice the size of Australia

不久之后 相当于澳洲这么大区域的海冰

[00:09:32]will vanish from the Arctic Ocean.

便从北冰洋消失不见

[00:16:55]The spring melt breaks the ice for visitors.

春季冰雪消融 为到访者打破了坚冰

[??:??:??]Narwhals.

那就是独角鲸

[00:33:01]The unicorns of the North are on a mission

这些北极的独角兽正在执行一项任务

[00:35:01]to reach the new fishing grounds in

即到达处于海湾的新渔场

[00:36:50]the bays that have been frozen up all winter,

这些海湾已封冻了一整个冬天

[00:39:20]but are now opening up.

而现在刚开始解冻

[00:42:17]To get to them, the narwhals must travel down leads,

独角鲸必须沿着冰上通道

[00:53:09]temporary cracks in the ice.

即冰上暂时性的裂缝前行

[00:55:26]But these new roads could close at any time,

但这些新的通道随时可能关闭

[00:59:24]cutting off the air that they need to breathe.

并隔绝它们所需的空气

[01:02:41]The road narrows,

这些通道不断变窄

[01:06:34]until there's barely room for one-way traffic.

最后连单向通行都很勉强

[01:10:33]Then, a surprise.

接着 出乎意料的是

[01:12:54]Narwhals coming from the other direction.

它们遇到了从另一个方向过来的独角鲸

[01:17:11]It's a stand-off.

狭路相逢

[01:23:05]Each team faces an armoury of sharp tusks.

双方都以尖锐的长角相向