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They spent 30 minutes on the bottom of the world before surfacing with their glass viewing ports cracked by the pressure .

在玻璃观察窗因为水压而破裂，最终浮出水面以前，他们在世界的底部逗留了30分钟。

The animals were matched with their calls by their surfacing locations and swim speed , as well as by digital cameras while they were near the surface .

研究人员通过他们浮出水面的位置和游泳速度来完成声音和个体的匹配工作，当他们靠近海面时，也会使用数码相机来辅助记录。

You 'll see what goals keep surfacing and what goals vanish .

你会看到哪些目标不断浮现而哪些逐渐消失。

But , he warns protectionist policies surfacing in some countries are no solution to these problems .

不过他警告说，一些国家正在出现的保护主义政策解决不了目前的问题。

Their brain hemispheres take turns so they can continue surfacing to breathe .

它们的大脑两个半球轮流值班，这样它们能够浮到水面来呼吸。