既然进化产生了即使有也很少的、无目的的生理反应，我们就可以从逻辑上假设哭泣有一个或多个增强生存能力的功能。
Since evolution has given rise to few, if any, purposeless physiological responset, it is logical to assume that crying has one or more functions that enhance survival.
父母警告她不要干扰动物，必须让它自己增强生存能力。
Her parents warn her not to interfere-the animal must grow strong on its own to survive.
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