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交换、交易和互换的倾向普遍存在于所有人之中,而在其他动物种族中找不到。
The propensity to truck, barter, and exchange one thing for another is common to all men, and to be found in no other race of animals.
如果你不经历艰难时刻,你就无法到达美好的时光。
Theologians may quarrel, but the mystics of the world speak the same language.