Quadrivalents
(quadrivalent 的复数) a. 四价的\\n[医] 四价的
🗣️ 情景例句
There's something missing. You've got a good eye, Richard.
少了些东西。你有艺术眼光， Richard。
Their son will start college in September.
他们的儿子将于九月份开始上大学。
No, he didn't!
没有！