降低繁殖率,這是對種群數量暴增的一種天然控製
旅鼠數量太多時會集體跳海自殺。同性戀也是一種大自然的安排
降低繁殖率,這是對種群數量暴增的一種天然控製
旅鼠數量太多時會集體跳海自殺。同性戀也是一種大自然的安排
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