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词汇 动物种群
例句 The balance of animal populations would be grossly upset very rapidly unless the law of requisite variety held in general throughout nature.除非必要品种规律在整个自然界起支配作用,否则动物种群的平衡就会迅速地被全面打破。Bad weather has decimated the national herd.恶劣的天气使得国内动物种群大批死亡。
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