əv prep
16 used to say what someone’s age is 〔用于说明某人的年龄〕
他有两个孩子: 十二岁的儿子和十五岁的女儿。
17
it is kind/stupid/careless etc of sb (to do sth)
17. used to say that someone’s action shows a particular quality 某人(做某事)是仁慈的/愚蠢的/粗心的等
18 used to say where someone comes from 来自…的〔用于说明某人来自哪里〕
22 used in giving the time, to mean ‘before’ [美,口] 〔用于表示时间,意思是“之前,不到”〕; AmE spoken BrE
现在是七点差一刻(即六点三刻)。
24 used to say what material has been used to make something 用…制的〔用于表示某物是由何种材料制成的〕 literary
25
of an evening/of a weekend etc
25. in the evenings, at WEEKENDS etc [英] 在晚上/周末等 BrE