an upstart who makes conceited, sardonic, insolent comments 同义词：wise guy, smart aleck, wisenheimer, weisenheimer,
例句与用法
1.
Some wiseacre has said that a genius is a man who " wears long hair , eats queer food , lives alone , and serves as a target for the joke makers . 有些自作聪明的人说，天才是“留长发、吃奇怪的食物、独居的人，是说笑话的人调侃的对象” 。
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