Quadrivalence
n. 四价\\n[医] 四价
🗣️ 情景例句
I work out at the gym everyday.
我每天都在体育馆进行锻炼。
What is the weather like in this country?
这个国家的气候如何？
Yes, we have been interested in new system.
是的，我们对新系统很感兴趣。