One mammal in4, one bird in8, one amphibian in 3 are threatened with extinction. species are dying out at a rhythm 1,000 times faster than the natural rate.
每四只哺乳动物、八只雀鸟、两只两栖动物就有一只濒临绝种，生物品种的死亡率比正常速度快了一千倍。
One mammal in4, one bird in8, one amphibian in 3 are threatened with extinction. species are dying out at a rhythm 1,000 times faster than the natural rate.
每四只哺乳动物、八只雀鸟、两只两栖动物就有一只濒临绝种，生物品种的死亡率比正常速度快了一千倍。
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