地球的力量 第4集 海洋(17):羅陀海峽

Someday, the Straits of Gibraltar will close up again

有一天直布羅陀海峽會再次關(guān)閉

and then the Mediterranean will disappear oncemore.

然后地中海又會再一次消失

Today's oceans are far more than just reservoirs ofwater

但是海洋并不僅僅是蓄水池

that fill and empty as thecontinents move.

隨著大陸移動要么灌滿水要么干涸

They are crucial for the way the planet works and for the existence of life itself

它們對于地球來說 對于生命本身的存在來說都很關(guān)鍵

To understand why, you have to see them not as individual seas,

為了了解原因你不可以將它們看作是單獨的海域

but as a whole, one single system.

而是看做是整體，一個系統(tǒng)

Even though we can't live beneath the waves,

雖然我們不能在海浪下生活

these vast bodies of water are vital to our very existence.

這片廣闊的海水對于我們的存在來說非常重要

Much of that is down to a group of ocean inhabitants that are surrounding me.

很大一部分原因是因為海洋地下的一群生物 生活在我們身邊

Single-celled organisms so small they're invisible to the naked eye.

單細(xì)胞有機體非常小肉眼是看不到的

They're known as phytoplankton.

它們被稱作是浮游植物