Sharks are keystone species in the world's oceans.

“鲨鱼是世界海洋中的关键物种。

All together, they're known as the world ocean.

它们一起被称为世界海洋。

Ten-second trivia: What is the world's smallest ocean?

世界上面积最小的大洋是哪个？

There are now five massive patches of floating garbage in the world's oceans.

目前，世界各地的海洋中有5大块漂浮垃圾区。

But sodium is found in the world's oceans, with a seemingly limitless supply.

但是钠元素分布于世界各地的海洋中，而且似乎拥有无限的供应。

The move sought to increase the animals' numbers in the world's oceans.

此举旨在增加全球海洋的鲸类数量。

Each year roughly 8 million tons of it wash into the world's oceans.

每年大约有800万吨的塑料被冲进世界的海洋。

The Mediterranean Sea makes up less than 1 percent of the world's oceans.

地中海只占世界海洋面积的不到1%。

Particle levels have been building up in the world's oceans for many years.

多年来，全球海洋中微塑料颗粒的含量一直在增加。

I'm the most shallow of the world's five major oceans, it's true.

我是世界上五大洋中最浅的，就是这样。

The materials pollute the world's oceans, affect wildlife, and turn up in drinking water.

这些物质污染了全球海洋，影响野生生物，并出现在饮用水中。

It's thicker than I've ever seen it anywhere else in the world's oceans.

这里的海雪比我在世界其它海洋中见过的都厚。

U.S. Department of State official Clifton Seagroves said protecting the world’s oceans is very important.

美国国务院人员克里夫顿·西葛洛弗（Clifton Seagroves）表示，保护世界海洋至关重要。

Yet the result of rising water temperatures is not evenly spread in the world's oceans.

然而，水温上升的结果在世界海洋中分布并不均匀。

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的温室，世界上的海洋会蒸发掉。

This is warming all the world's oceans, it's warming the atmosphere, destabilising the climate.

全世界的海洋都在变暖，大气也在变暖，气候变得不稳定。

More than 80% of the world's oceans are still unmapped, unobserved, and unexplored.

世界 80% 以上的海洋仍然未被测绘，未被观测，未被勘探。

Krill are a small shrimp-like crustacean and can be found around all of the world's oceans.

磷虾是一种类似虾的甲壳动物，在全世界的海洋中都可以见到它们。

So finally, what can be done to retain the diversity of species in the world's oceans?

那么，要保持世界海洋中的生物多样性，我们能做些什么呢？

Effectively roping off one-third of the world's oceans will require an unprecedented level of global cooperation.

有效隔绝世界1/3的海洋需要国际社会展开前所未有的合作。