the algae start to grow. 藻类开始生长

147. but nutrients alone can not support life.
     但只有养分并不能维持生命
148. There must also be sunlight.
     还必须有阳光
149. In the spring, as the sun daily climbs higher in the sky
     春天 太阳高悬空中
150. the algae start to grow.
     藻类开始生长
151. Blooms the size of the Amazon Rainforest turn the seas green.
     旺盛的藻类占据着亚马逊雨林般大小的面积 它们将大海染绿
152. Individually the algae are tiny but together, they produce three quarters of all the oxygen in our atmosphere.
     单体藻类虽然很细小 但它们共同产生了我们大气中四分之三的氧气
153. They're eaten by an array of bewildering creatures.
     藻类被一群让人困惑的生物吃掉

来自《行星地球 第一季 第九集 Planet Earth S01E09 海洋》第 150 行