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In winter, the temperate seas are lashed by violent storms.
在冬季，氣候溫和的海域被風暴肆虐著。
The turbulence stirs the water, and draws nutrients up from the depths,
湍流激起海水，將深處的養分攪上來，
but nutrients alone can not support life.
但只有養分并不能維持生命。
There must also be sunlight.
還必須有陽光。
In the spring, as the sun daily climbs higher in the sky, the algae start to grow.
春天，太陽高懸空中，藻類開始生長。
Blooms the size of the Amazon Rainforest turn the seas green.
旺盛的藻類占據著亞馬遜雨林般大小的面積，它們將大海染綠。
Individually the algae are tiny, but together,
單體藻類雖然很細小，
they produce three quarters of all the oxygen in our atmosphere.
但它們共同產生了我們大氣中四分之三的氧氣。
They're eaten by an array of bewildering creatures.
藻類被一群讓人困惑的生物吃掉。
Salps appear in the plankton soup.
樽海鞘出現在浮游生物湯中。
Individuals link together to form chains which can stretch for fifteen meters.
這些一個個單體組成的鏈條可長達15米。
Pumping water through their bodies they strain out algae and other edible particles.
他們用汲取海水，在身體里過濾、分離出藻類及其他可食用微粒。
