n.费用；花费；代价

It's too much of an expense for me to own a car. 对我来说，拥有一辆汽车的花费太大。

Societies should try to save every plant and animal species, regardless of the expense to humans in effort, time, and financial well-being. 社会应尽力挽救每一动植物物种,不管花费多少人力、时间和财力。

He finished the job at the expenses of his health. 他以牺牲健康完成了这项工作。

That's why a reduction in price can never be made at the expense of quality. 正因为如此,降低价格的同时,并不能以牺牲质量为代价。