n.惊呼；惊叹词
I wish the exclamation mark had not been painted out, it would have made the slogan more forceful. 我想那个惊叹号要是没有被涂掉就好了，它会使标语更加有力。
My sainted aunt! ie as an exclamation expressing surprise. 我的妈呀! (表示惊讶的用语).
