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就是说，处在一个种群里对哺乳动物是极端重要的。
That is, being in a family group is extremely important for mammals.
youdao
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所有的试验装置都处在两个极端情况之间。
All test equipments lie between these two extremes.
youdao
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所有的试验装置都处在两个极端情况之间。
All test equipments lie between these two extremes.
youdao