Time was when biologists somewhat overworked the evidence that these creatures preserve the health of game by killing the physic

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问题 Time was when biologists somewhat overworked the evidence that these creatures preserve the health of game by killing the physically weak, or that they prey only on "worthless" species.

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答案曾经有段时间,生物学家或多或少滥用了一种证据,即这些生物通过杀死体弱者来保持种群的健康,或者说它们仅仅捕食没有价值的物种。

解析 本句的主句为主系表结构的Time was when...evidence,两个that均引导evidence的同位语从句,且这两个同位语从句均较长,为表意清楚,宜将主句和两个同位语从句进行拆译,即把两个从句分别译成小短句,具体阐明evidence是什么。
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