at great [little; almost no] expense

花很多钱[花很少钱；几乎没有花一毛钱]。

at sb's expense

花某人的钱。嘲笑、轻视。

at the expense of

以...为代价；牺牲。

go at the expense of

花钱于...。

pub sb to expense

使某人破费。

spare no expense

不惜钜资。

expense account

(薪资之外支给的)交际费；律贴；费用表。