But the force of the tide makes the river runbackward.

潮汐驱动着河流倒流

Woo-hoo! Look at that!Whether it's a tidal bore orcrashing wave,

喔哦，看那边! 无论是潮涌还是巨浪

the oceans capture, store, and deliverenergy,whether it comes from the wind,

海洋捕获，存储和提供能量 不管来自与风能

or the gravitational pullof the Moon and the Sun.

还是来自月球和太阳的万有引力

The energy is turned into a powerful force

这个能量变成了一股巨大的力量

that has carved the coastline of every continent.

雕刻出了每个大洲的海岸线

This is a battle for territory between land and sea

这是陆地和大海之间的地盘之战

that's been fought for billions of years.

已经进行了数十亿年了

On the coast of Oregon is dramatic evidence of the shoreline created by this age-old conflict.

俄勒冈州的海岸 就是这场持久冲突形成的最壮观的海岸线

But it would have looked very different 12 million years ago.

但是1200万年前这条海岸线与今日完全不同

Even though the cliffs are made from basalt, 3 particularly tough rock.

虽然悬崖是玄武岩形成的一种非常坚硬的岩石

over the years, the sea has attacked every line of weakness.

但是这么多年大海袭击了每条脆弱的海岸线