一般说来，警察在没有逮捕令的情况下无权拘捕一个人，如果那个被捕的人不知道或没被告知为什么要逮捕他理由的话。

Generally a policeman is not entitled to arrest someone without a warrant if the person do not know or be not tell the reason for his arrest.

youdao

一般说来，警察在没有逮捕令的情况下无权拘捕一个人，如果那个被捕的人不知道或没被告知为什么要逮捕他理由的话。

Generally a policeman is not entitled to arrest someone without a warrant if the person do not know or is not tell the reason for his arrest.

youdao