against/əˈɡeɪnst, əˈɡenst/
prep.1. 相反；逆着against the law违法
We sailed against the wind.我们逆风行船。
Drug taking is against the law.吸毒是违法的。
2. 反对We won our match against that team.我们在比赛中赢了那个队。
No one is against this proposal.没有人反对这个提议。
3. 靠着，依着to lean against the wall靠着墙
4. 与…成对照against a dark background与黑色背景成对照
The picture looks better against the light wall.这幅画挂在浅色的墙上显得更美。
5. 防备；防御against the cold防冷
against a rainy day防备雨天
We are all taking medicine against the flu.我们都在服药预防流感。
6. 以…相抵income against expenditure以收抵支