This is despite a threefold increase in coal output, meaning that the death rate has plunged by about 80 percent.

与此同时，煤炭产量却增长了3倍，意味着死亡率下降了约80%。

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Over the whole planet, there will be a threefold increase in the average acidity of the oceans, which is unprecedented during the past 20 million years.

在整个地球，海洋平均酸度将增加三倍，这是在过去两千万年里从未发生过的。

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Over the whole planet, there will be a threefold increase in the average acidity of the oceans, which is unprecedented during the past 20 million years.

在整个地球，海洋平均酸度将增加三倍，这是在过去两千万年里从未发生过的。

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