物种灭绝的标准“Their proposed threshold for extinction was ten species per million per year.”说的是“生物学家提出的物种灭绝的阈值为...”,哪位知道里面这个ten species per million per 每年每百万个物种还是

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物种灭绝的标准“Theirproposedthresholdforextinctionwastenspeciespermillionperyear.”说的是“生物学家提出的物种灭绝的阈值为...”,哪

物种灭绝的标准“Their proposed threshold for extinction was ten species per million per year.”说的是“生物学家提出的物种灭绝的阈值为...”,哪位知道里面这个ten species per million per 每年每百万个物种还是
物种灭绝的标准
“Their proposed threshold for extinction was ten species per million per year.”说的是“生物学家提出的物种灭绝的阈值为...”,哪位知道里面这个ten species per million per 每年每百万个物种还是每百万个生物中有10个物种灭绝?这是物种灭绝的门槛还是物种灭绝危机的门槛啊?

物种灭绝的标准“Their proposed threshold for extinction was ten species per million per year.”说的是“生物学家提出的物种灭绝的阈值为...”,哪位知道里面这个ten species per million per 每年每百万个物种还是
说的是在每一年,每一百个物种中就有十种灭绝