A man who betrays friends abases himself.

出卖朋友的人实际上是自贬身份。

Roger always abases himself, which I think is of no need.

总是贬低他自己，我觉得那样做是没有必要的。

Never abases or debases others, belittle or humiliate others.

绝不贬低他人，轻视或侮辱他人。

A author abases the other author competed with him to improve his position.

一位作家贬低另一位与他有竞争关系的作家，为了提高他的地位。