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来源:雅诚德英语网
Population cycles are characteristic of small mammals, and they sometimes appear to be brought about by predators.
数量的周期循环是小型哺乳动物的特征,它们有时似乎是由捕食者造成的。
Population cycles are characteristic of small mammals, and they sometimes appear to be brought about by predators.
数量的周期循环是小型哺乳动物的特征,它们有时似乎是由捕食者造成的。