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。

The soldiers expended all their ammunition in that fight. 士兵在那场战斗中用尽了所有的弹药。

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。