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义务是由于对法则的敬重而产生的行为必要性。
你输得越多,学到的就越多。你学得越多,就会变得越好。
在家不会接待客人,出去后才知道这个问题的重要性。
When someone makes a decision, he is really diving into a strong current that will carry him to places he had never dreamed of when he first made the decision.