And yet nobody prolonged his underwater work beyond the time allotted him.

可是，没有谁超出指定时间，延长自己在水下工作。

Most of an iceberg is actually underwater.

冰山大分山体是在水下。

No, our hotels really are under water - a true submarine holiday experience!

不，我们酒店真是在水下--真正水下度假之旅！

Sound travels four and a half times faster in water than on land.

在水下速度是在空气中四倍半。

Okay, so that's how fish breathe underwater, but what about whales and what about dolphins?

好吧，这就是鱼在水下呼吸方式，但是鲸鱼呢，还有海豚呢？

But because light behaves differently underwater, they have a hard time discerning red in its shades.

但由于光线在水下表现不同，它们很难分辨出阴影中红色。

Dried out earth that used to be underwater has created dust clouds that contain calcium, sulfur and arsenic.

曾经在水下土地干涸后形成了含有钙、硫和砷。

They're the only iguanas that can swim and forage underwater!

它们是唯一能游泳并在水下觅食蜥蜴！

Typically, very strong earthquakes occur underwater, Margarita Segou, a seismologist with the British Geological Survey, said.

英国地质调查局地震学家 Margarita Segou 说，通常情况下，非常强烈地震是发生在水下。

It's a wetsuit for going underwater, like penguins.

这是在水下用潜水服，就像企鹅一样。

That's a win-win-for life below the water and for those of us who live on land as well.

这是种双赢局面——对生活在水下生命还有对生活在陆地上我们来说，都是如此。

Anyone who's ever accidentally tried to take a breath underwater can certainly attest to that.

任何曾经不小心想要在水下吸气人都可以证明这一点。

And here's what would happen if we could breathe underwater.

以下就是我们能在水下呼吸发生事。

You don't have a minimum distance underneath the water.

你在水下没有最小距离。

The scorpion's ancestors were almost three feet long with gills to allow them to breath underwater.

蝎子祖先有近三英尺长，有能让它们在水下呼吸鳃。

It's that thing that we have in our heads that doesn't like being underwater.

这是我们头脑中不喜欢在水下东西。

The mother then feeds her calf underwater for two years.

然后海豚妈妈在水下喂养她幼崽两年。

But there’s a part you don’t normally see, what lurks beneath the water.

但是有一分你通常看不到， 那就是潜伏在水下东西。

And you forget how submerged you are.

然后你就忘记了自己在很深水下。

Divers continue to search for survivors of an overturned cruise ship on China's Yangtze River.

潜水员继续在水下搜寻长江侧翻游轮幸存者。