A young man saw Edison, said, "I want to develop a sort of  all-purpose dissolvent, by which can dissolve all materials." Edison asked a question in reply, "In that case, what container shall you hold it with?" 
 
一个后生找到爱迪生，说：“我准备研制一种万能溶剂，它能溶解一切物质。”爱迪生反问：“那你用什么来盛它呢？”