Most of the carbon is returned to near-surface waters when phytoplankton are eaten or decompose, but some falls into the ocean depths.

大部分的碳会在浮游植物被食用或者分解的时候返回到近地表水域，但仍有一部分被带进了大洋深处。

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Most of the carbon is returned to near-surface waters when phytoplankton are eaten or decompose, but some falls into the ocean depths. Illustration adapted from a New Wave of ocean Science, u.

大部分的碳会在浮游植物被食用或者分解的时候返回到近地表水域，但仍有一部分被带进了大洋深处。

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Few of tropical Africa's rivers are navigable from the ocean, dropping as they do from interior tableland to coastal plains by a series of falls and rapids.

酷热的非洲，几乎没有适于航海的河流，这些河流从内陆高原到海岸平原一路穿瀑布、过险滩，倾流而下。

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