He is trying to improperly influence a witness.

他正试图不适当地影响一名证人。

《柯林斯英汉双解大词典》

Improperly discarded garbage can spread bacteria that are dangerous to health.

不当丢弃的垃圾会传播细菌并有害健康。

youdao

He was improperly dressed for the occasion.

他的衣着不大适合这个场合。

《牛津词典》

The investors want the bank to buy back any improperly processed loans included in those securities.

VOA: special.2010.10.22

Dr.Nissen points out that many over the counter drugs - aspirin,ibuprofen, acetaminophen or paracetamol - can be toxic if used improperly.

VOA: standard.2010.03.02

Companies can now suffer substantial losses when their products are improperly used even when users are amply warned.

FORBES: Supremely Destructive Stupidity

Those checks did not turn up anything to indicate the burial was done improperly.

CNN: Sheriff: Tamerlan Tsarnaev's burial was handled properly

Improperly filling out a ballot is "the number one way people disenfranchise themselves, " McDonald said.

CNN: In voting, the early bird skips the line