The celebrated mathematician, Edmund Stone, would never have published a mathematical dictionary, never have found the key to science of mathematics, if he had given his spare moments to idleness.

 
  • 著名数学家爱德蒙?斯通如果闲暇时无所事事,就不会出版数学词典,也不会发现开启数学之门的钥匙。
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