Take care that you don't presume on my feelings.

注意不要滥用我的感情。

He presumes on his strength.

他自恃力气大。

We mustn't presume too much upon the reliability of such sources.

我们不应过分指望这类消息来源的可靠性。

Her good nature can be presumed upon once too often.

不妨再利用一次她那善良的天性。