Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
That's a great drawing of your girlfriend, but you should emphasize the nose a bit more.
你的女友这张画像很漂亮，但你应该把她的鼻子再勾画一下。
Where are you going this afternoon?
今天下午你哪里去了？
No, I'm from Britain.
不，我从不列颠来。