- Along the coast of California, ocean currents carry a constant supply of nutrients up from the depths to the surface layers.
在加利福尼亚沿海,洋流持续不断的把养分从海底 带到海平面上来 - These upwellings fertilize forests of giant kelp, that thrive in the summer sunshine.
这种上升洋流给巨藻带来了大量养分 在夏日阳光照射下它们飞速生长 - The algal towers are as high as a three story house
这片巨藻林有足有三层楼那么高 - and they can grow by half a meter a day.
它们每天还能长半米 - Life in the kelp is as full of drama, as in any other forest
海藻中的生命充满戏剧性 跟其他森林一样 - but the cast is less familiar.
但演员们仍不太为人知. - An army of sea urchins is mounting an attack.
一大群紫海胆正在发动进攻
and they can grow by half a meter a day. 它们每天还能长半米
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