Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
May I have a tour of the cockpit, please?
我能参观一下驾驶舱吗？
He that would the daughter win,must with the mother first begin.
要想赢得女儿的欢心，必须先从她母亲着手。
I ought to go home. I have to cook supper for my grandmother.
我该回家了。我得给奶奶做晚饭。