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1·Worldwide, this “biological carbon pump” transfers about 10 gigatonnes of carbon from the atmosphere to the deep ocean each year.

在全球范围内，这种“生物碳泵”每年从大气中向深海转移约10亿吨的碳。

2·While not strictly necessary, your pond can benefit from having a pump and biological filter to keep water cleaner.

虽然不是绝对必要，你可以受益于池塘有一个泵和生物过滤水保持清洁。