expense在这什么意思

题目

expense在这什么意思
只要翻译例句就行,解释只作参考
at the expense of somebody/somethingif something is done at the expense of someone or something else,it is only achieved by doing something that could harm the other person or thing:
例句：
the growth in short breaks,at the expense of longer package holidays

答案

at the expense of
adj.以...作为代价(靠)
短假的增长是以长假为代价的.