Quadrivalency
n. 四价
🗣️ 情景例句
I'll accept.
我接受邀请。
Thank you for a very enjoyable evening.
谢谢你，今晚过得真愉快。
This caused the construction of gigantic buildings where too large masses of human beings are crowded together.
这样就导致了许多摩天大厦拔地而起，大厦内众多的人挤在一起。