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来源:雅诚德英语网
Since evolution has given rise to few, if any, purposeless physiological response, it is logical to assume that crying has one or more functions that enhance survival.
既然进化很少发生,亦或发生无意识的生理反映,也就很合乎逻辑地设想到哭具有某种或更多的有助于提高幸存能力的功能。