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Birds and mammals invest in quality and not quantity, as opposed to fish and reptiles.
鸟类和哺乳类靠质生存,而非以量取胜，这与鱼类和两栖类不同。
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- 来自原声例句
Birds and mammals invest in quality and not quantity, as opposed to fish and reptiles.
鸟类和哺乳类靠质生存,而非以量取胜，这与鱼类和两栖类不同。
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