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来源:雅诚德英语网
If individuals on the edge of a group are more vigilant because they are at greater risk of being captured, then individuals on average would have to be more vigilant in smaller groups.
如果处于群体边缘的个体由于被捕获的风险更大而变得更加警惕,那么个体通常在较小的群体中就必须更加警惕。