some scientists are really absent-minded.
the great french physicist andrè-marie ampère（1775-1836） was invited to have dinner with napoleon；ampère forgotand never showed up.maybe ampère's absent－mindedness hadsomething to do with the sadness of his private life；his fatherwas guillotined in the french revolution； his wife， with whomhe was deeply in love， died after they had been married only a fewyears.when ampère was dying，in 1836，he chose the in－scription to be placed on his tombstone.it was tandem felix-“happy at last.”
有些科学家的确心不在焉。
法国伟大的物理学家安德烈·马里耶·安培（1775－1836）曾经被邀请和拿破伦一起共进午餐；安培却把此事忘得一干二净，根本没有露面。安培的心不在焉也许和他个人生活的悲怆有关。他的父亲在法国大革命中被送上了断头台；他深爱的妻子婚后几年即去世。1836年安培临终时为自己的墓碑上所选的话是：“最后终于幸福了。”