多吃水果和蔬菜：由于含有很多光合作用产物和具有生物活性的抗氧化剂，蔬菜水果可有效防止癌变。

Eat more fruits and vegetables. They'll reduce your risk of many forms of cancer because of all the phytochemicals and antioxidants they contain.

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这些浮游生物的光合作用量占到海洋中生物光合作用量的40%，因此，这样的伽马射线爆可能会对地球的二氧化碳水平产生严重影响。

These organisms account for up to 40% of the ocean's photosynthesis, so such an event could have a serious impact on Earth's carbon dioxide levels.

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在海洋上层200米左右的水体中，有些死亡或排泄物质在微生物的作用下转变为二氧化碳，并重新进入大气层。

In the top 200 metres or so of the sea, some dead or faecal matter is turned back into CO2 by microbes and may then re-enter the atmosphere.

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