vt.花费；消耗
He lived high and expended largely. 他生活讲究，花费很大。
He has expended much time and energy on that experiment. 他已经花费许多时间、金钱在那实验上。
I had expended much time on the work but they told me it's useless. 我花了很多时间在这件工作上，他们却告诉我说这是无用的。
expend的基本意思是“花费,使用(钱等)做某事”,其宾语可以是钱、时间、精力等,常与in或on连用。
