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有这样一则故事:锁匠老了,准备将一身技艺传给两个青年中的一个。经过一段时间培训后,老锁匠决定对他们进行一次考试。于是准备了两个保险柜让两个徒弟去打开。结
There is a story: the locksmith old, ready to pass on a skill to one of two young people. After a period of training, the old locksmith decided to give them an exam. So prepared two safes to open two apprentices. Knot