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物理学家安培,有一次正专心致志地思考一个问题,他从家里出来,用粉笔在门上写给约会的来访者:“安培先生不在家,请今天晚
Once upon a time, physicist Ampere, who is devotedly thinking about a problem, came out of his home and wrote on the door to the visitor with chalk: "Mr. Ampera is not at home, please tonight