1 . He would never be improper, he is always the perfect gentleman.

他总是举止得体，一直是个完美的绅士。

来自柯林斯例句

2 . Mr Matthews maintained that he had done nothing improper.

马修斯先生坚称他没有做过非法的事情。

来自柯林斯例句

3 . It's considered improperto be unclothed in public.

在公共场合赤身裸体被认为是不成体统的。

来自柯林斯例句

4 . The committee concluded that the senators had engaged in improperconduct.

委员会断定议员们从事了不正当活动.

来自《简明英汉词典》

5 . He was very indignant with his wife over her improperconduct.

他对他妻子的不端行为感到非常愤慨.

来自《现代汉英综合大词典》

1.not suitable or right or appropriate;

slightly improper to dine alone with a married man

2.not conforming to legality, moral law, or social convention;

an unconventional marriage

3.not appropriate for a purpose or occasion;

unsuitable attire for the office