Quadrivalency
n. 四价
🗣️ 情景例句
I'm glad our negotiation has come to a successful conclusion.
我很高兴这次洽谈圆满成功。
Don't take it the wrong way.
别误会我的意思。
No one could account for the fact that one of the boxes was extremely heavy.
其中有只箱子特别重，可谁也弄不清是怎么回事。