Cyanobacteria extensively distributed in inland and ocean water are very important for carbon and nitrogen cycle.

蓝藻在水体中分布广泛,对水体中碳、氮循环起到重要作用.

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If this nitrogen cycle repeated elsewhere, many of the world's forest won't be absorbing much CO 2.

如果这种氮循环不断重复进行, 那么世界上很多森林都不能再吸收二氧化碳.

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