Coral reefs are only found in shallow, tropical seas.

珊瑚礁只存在于热带地区的浅海中。

At that time, most creatures swam or crawled in shallow seas.

那时，大多数生物在浅海中游泳或爬行。

There's only bare sand and the warm shallow sea beyond.

这个荒凉沙漠远离温暖的浅海。

With the retreating ice, rough weather and ferocious currents stir up these shallow seas.

随着冰雪的消退，暴烈的天气和汹涌的洋流把这片浅海搅得天翻地覆。

A shallow sea had begun to split the continent that would become the Americas.

如今的美洲大陆在当时被一片浅海一分为二。

Like many tropical shallow seas, these crystal clear waters are virtually lifeless.

和多数热带浅海域一样，这片明净的水域实际上没有什么生机。

The abundance of food in the shallow seas attracts many other species of whale and dolphin, including humpbacks.

浅海区充足的食物吸引了很多其它种类的鲸和海豚，包括座头鲸。

While today they are swallowed by shallow seas, this is only the result of a geologically recent rise in sea levels.

虽然如今它们被浅海所淹没，但这只是地质上最近海平面上升的结果。

And those floodings also made very shallow seas that can get into the lands.

这些洪水也造成了非常浅的海水，可以进入陆地。

Lagoons and shallow seas often deposit chalky sediments composed of plankton exoskeletons.

泻湖和浅海经常沉积由浮游生物外骨骼组成的白垩质沉积物。

Originally, they’d been laid down as horizontal beds, mostly in rivers or shallow seas.

最初，它们被铺设成水平 床，主要在河流或浅海中。

About 93 million years ago, sea levels rose, submerging the Kem Kem region in a shallow sea.

大约 9300 万年前， 海平面上升，将 Kem Kem 地区淹没在浅海中。

An asteroid six miles wide struck the Earth, causing major impacts to many ecosystems, including the shallow seas.

一颗六英里宽的小行星撞击地球，对包括浅海在内的许多生态系统造成重大影响。

As it coalesced, its interior was filled with deserts, while the single coastline eliminated many of the shallow tropical seas where biodiversity thrived.

由于陆地中充满了沙漠，在合并的过程，堆积的沙滩湮没了许多生物赖以生息的热带浅海海域。

By casting the fish net while standing on stilts, the fishermen can efficiently catch fish in the shallow sea.

这个高度借助一副高跷，再撑开渔网作为支点可以有效地将近海的鱼虾一网打尽。

Humans have made use of the ecosystems of the  shallow seas since before recorded history in the form of fishing.

自有记载的历史之前，人类就已经通过捕鱼的方式利用浅海生态系统。

The temperature of the water rarely rises above minus one degree Celsius, but the shallow seas of the Arctic are some of the earth's richest.

这里的水温很少上升到摄氏零下一度以上，但北极的浅海区却是地球上最富饶的海域之一。

Sea levels were high, and the continents were surrounded by vast, shallow seas, full of exotic creatures like rugose corals, crinoids, and jawless fish.

海平面很高，大陆被广阔的浅海包围，充满了奇异的生物，如长皱纹珊瑚、海百合和无颌鱼。

This caused ocean levels to drop and shallow seas to drain and after several cycles of growing and shrinking glaciers, about 86 per cent of species were lost forever.

这导致海平面下降，浅海干涸，并且在经过几轮冰川的生长和收缩后，大约有86%的物种永远消失了。

In this episode, however, I'm going  to discuss the small fraction that lies close to the land and where light  can reach the bottom – the shallow seas.

然而，在本集中，我将讨论靠近陆地且光线可以到达海底的一小部分——浅海。