paid for by someone
由某人付费；由某人承担费用
the document was printed at the taxpayer's expense.
文件的印刷费用由纳税人承担。
so as to cause harm to or neglect of
以…为代价；忽视
the pursuit of profit at the expense of the environment.
以环境为代价的利润追求。
language courses which emphasize communication skills at the expense of literature.
强调交际技能而忽视文学的语言课程。
To (one's) detriment or chagrin
对某人不利
telling jokes at my expense.
我被嘲弄了一番