adj.隐秘的;不可告人的;秘密的;矢口否认的;
例句:
She felt so free from ulterior motives.
她觉得已毫无言不由衷的必要了.
They have no ulterior motive.
他们并非别有用心.
This lever must serve some ulterior purpose.
这撬棒准是用于不可告人的目的的.