They live on the ocean floor.

生活在海底。

And much about the ocean floor is unknown.

但海底仍然深未可知。

She sits on the ocean floor.

她坐在海底。

Could humans build neighborhoods and cityscapes on the ocean floor?

那人类能在海底打造社区、建设城市吗?

The destruction of old ocean floor happens in 'subduction zones.'

旧海底的破坏发生在“俯冲带”。

Underneath kilometers of seawater, the ocean floor is full of riches.

在数公里的海水之下，海底充满了财富。

One mile down, on the ocean floor, they look like this.

在一英里以下的海床上，它们看起来就是这样的。

The young flatback turtle searches for food on the ocean floor.

年幼的平背海龟在海底搜寻着食物。

So how much time does that give you on the ocean's floor?

那你在海底有多少时间？

This is when a boat tows a weighted net along the ocean floor.

这是指一艘船沿着海底拖着一个加重的网。

This is the ocean floor. But this isn't rock sprouting out at the bottom.

这就是大洋底。但是它的形成却不是因为底部地壳的挤压。

Metal-rich nodules scattered across various parts of the ocean floor are a possibility.

有一种可能的来源是分布在海底各处的富含金属的结核。

The brush of sand as a moray eel slides along the ocean floor.

欧洲海鳗划过海底留下的痕迹。

What percentage of the ocean floor has never been mapped or explored by humans?

海底有多少从未被人类绘制过地图或探索过？

Coral reefs cover less than 1 percent of the ocean floor.

珊瑚礁覆盖面积不足海底的1%。

Natural oil spills, when the substance simply seeps out of the ocean floor, are possible.

有可能是原油从大洋底部自然渗出。

Plate tectonics created heat and pressure, that produced rock lighter than the ocean floor.

地壳板块运动的不断加热和挤压从海平面上升起大量岩石、陆地。

But the industry also adds to the junk piling up on the ocean floor.

但该行业也使堆积在海底的垃圾不断增加。

Those early glimpses of the deep ocean floor suggested very little happened down there.

在对深海海床的早期观测中，人们认为那里并没有发生什么。

6000 meters is the average depth of the oceanic crust beneath the ocean floor.

6000米是大洋底下的海洋地壳平均深度。