sth (on sth/in doing sth) (a) use (time,etc) for a purpose 花（时间等）:spend a lot of time on a project/(in) explaining a plan 花很多时间进行某项目[解释某方案] * spend one's energy cleaning the place up 用力气把那地方打扫乾净.(b) use sth up; exhaust sth 用完,耗尽（某物）:The blizzard quickly spent itself,ie used up all its force.暴风雪很快就停了下来.* They went on firing until they had spent all their ammunition.他们不停地射击,耗尽了所有的弹药.* I've spent all my energy on this.我对此事已呕尽心血.
摘自灵格斯 牛津高阶
