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。