从别人的，自己的错误或者其他资源诸如书中吸取教训。
To open up and learn from the mistakes of others, from your own mistakes and from other sources like books.
我们应该从别人的错误中吸取教训。
理论推测，当这个坏人碰到这种别人不愿意与之合作的情况时，他会从中吸取教训并且变成一个更合作的人。
When he encounters such a withdrawal of collaboration, the theory goes, the malefactor will learn the error of his ways and become a more co-operative individual.
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