When discussing these moral principles, Freud mentions of natural character of mankind and points out the man has the tendency of hedonism, utilitarianism and egoism.
2
娱乐，源于人类趋乐避苦的本性，是最能打动人心的有效手段。
The entertainment source from the human natural of tending happiness and avoiding bitter, is the effective method to move people's heart.
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