ADJ [ADJ n](动机等)隐蔽的,隐秘的,隐藏的 If you say that someone has an ulterior motive for doing something, you believe that they have a hidden reason for doing it. (动机等)隐蔽的,隐秘的,隐藏的
Sheila had an ulterior motive for trying to help Stan. [+ for]
希拉想帮助斯坦是另有所图的。
Posing for the camera pleased him more than anything else. No doubt with the ulterior object of catching votes.