in no circumstances can more work be got out of

问题描述

精选答案

这里没有缺少成分喔~全句是：In no circumstances can more work be got out of a machine than WHAT is put into it. “what”被省略了，它可以等于 the amount of work. 如：He was in poor health because he had done more work than （what）was necessary for him.