He finished this design on time at the expense of his health. expense 有名词形式 也有动词形式 n. 损失,代价;消费;开支 vt. 向…收取费用 vi. 被花掉 The company's expense this year was more than its revenue.
He finshed the design on time at the expense of his health. expense作为名词,表示“代价,支出”,不可数,常见的搭配如本例中的“at the expense of 以什么为代价",此外还有at no expense 没有损失地;daily expense 日常费用。