ulterior
adj. 将来的，较远的；在那边的；隐秘不明的
例句
Sheila had an ulterior motive for trying to help Stan.
希拉设法帮助斯坦是别有用心。
《柯林斯英汉双解大词典》
She must have some ulterior motive for being nice to me—what does she really want?
她对我这么好，一定别有用心—她到底想干什么呢？
《牛津词典》
I have an ulterior motive in offering to help you.
我主动提出要帮助你是有私心的。
