Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
That's what I love about Susan.
这就是我爱Susan的一点。
Misforunes come on horseback and go away on foot.
遭灾易，消灾难。
A recent article in a weekly newspaper, for instance,
例如，最近一家周报刊登了一篇文章，