adv.因何;为何;在那里;对那个;
conj.对那个,随即;
例句:
I know the things whereat you are displeased.
我知道你所不高兴的是什么.
He turned to leave, whereat she began to weep.
他转身离开, 当下她开始哭了起来.
Whereat was he offended?
他为何生气?