Marine snow, detritus from the creatures swarming in the sunlit waters above.

海雪海洋表面上物产型有机物碎屑。

These commonly occur when there's severe weather over the ocean.

通常发在海洋上恶劣天气。

The world's oceans are also vastly mysterious places.

世界上海洋也非常神秘地方。

This is basically what happens in the ocean recreate on land.

基本上在陆地上重现海洋过程。

But the oceans of the young Earth soon faced another danger, that of freezing over.

但年轻地球上海洋很快面临另一种危险，那结冰。

But what about parts of the earth where there aren't oceans?

但地球上没有海洋那些部分呢？

Its subsurface ocean may contain more water than all of Earth' s oceans combined.

它地下海洋所含水可能比地球上所有海洋总和还要多。

It may even be liquid under the surface, like the oceans of Enceladus and Europa.

它甚至可能液态，像土卫二和木卫二上海洋一样。

And coral reefs are dying around the planet because of ocean heatwaves.

由于海洋热浪，地球上珊瑚礁正在死亡。

Zhang noted that ocean tides on Earth are affected in this way.

张指出，地球上海洋潮汐样受到影响。

But Titan's seas and lakes are filled with liquid methane rather than water.

但土卫六上海洋和湖泊充满了液态甲烷而不水。

This really is the ocean equivalent of a rainforest.

里真算得上海洋中热带雨林。

As ships sail across the waves, their wake stands out from the dark ocean waters.

轮船破浪行驶时，会在昏暗海洋水域上留下鲜明尾迹。

Right, we're talking about oceans, the biggest bodies of water on earth.

，我们正在谈论海洋，地球上最大水域。

Lima is a city that sits on the ocean behind the Andes and the Amazonian forests.

利马一座坐落在安第斯山脉和亚马逊森林后面海洋上城市。

He was very fond of flying fish as they were his principal friends on the ocean.

他非常喜爱飞鱼，拿它们当作他在海洋上主要朋友。

The atmosphere will turn into a moist greenhouse, and the world's oceans will evaporate away.

大气层会变成一个潮湿温室，世界上海洋会蒸发掉。

But experts estimate it contains between four and 18 percent of the world's known marine species.

但专家估计，它包含了世界上已知海洋物种4%到18%。

Similar, smaller programs were successful in the past in the ocean off the coast of New Hampshire.

类似，规模较项目过去在新罕布什尔州海岸附近海洋上也取得了成功。

More than half a million bottlenose dolphins swim in Earth's oceans and fortunately, they are not endangered!

幸运，地球上海洋里仍然畅游着超过50万头宽吻海豚，它们还未面临灭绝危险！