nonplus GRE

The speaker was completely nonplussed by the question.

演讲者被这问题完全难倒。

I was completely nonplussed by his sudden appearance.

然出现使我大惊。

Diane was nonplussed by such an odd question.

黛安被这古怪的问题给困惑住。

The professor is never at a nonplus, and never perplexed by a problem.

那位教授从来不会感到困惑，也不会被任何问题所难倒。