Lemma
n. 輔助定理, 論點, 引理\\n[醫] 膜, 衣
? 同義詞
??? 情景例句
Don't you have to work?
你明天不用上班嗎？
Excuse me, how can I get to the bus station?
對不起，汽車站怎么走？
It would be a waste of money to buy the IBM PC586.
買IBM586就浪費錢了。