Quadrivalency
n. 四价
🗣️ 情景例句
Yes, but I also want to apply to several other colleges.
是的 ，但我还想申请几所其他的大学。
People go to visit their parents, relatives and friends.
人们出门探望父母、亲威和朋友。
I don't believe we've met.
我们以前没有见过吧？