Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
Sure.
当然可以。
What will you do the day after on next?
后天你干什么？
Yesterday afternoon Frank Hawkins was telling me about his experiences as a young man.
昨天下午弗兰克。霍金斯向我讲述了他年轻时的经历。