Their groundless accusation is made with ulterior motives.

　　他們的無端攻擊是別有用心的。

　　I have an ulterior motive in offering to help you.

　　我主動提出要幫助你是有私心的。

　　She must have some ulterior motive for being nice to me ─ what does she really want?

　　她對我這么好，一定別有用心——她到底想干什么呢？

　　Sheila had an ulterior motive for trying to help Stan

　　希拉想幫助斯坦是另有所圖的。

　　She felt so free from ulterior motives.

　　她覺得已毫無言不由衷的必要了。