Quadrivalency
n. 四价
🗣️ 情景例句
I have a new math program, and I want to learn how to use it.
我有一个新的数学程式 我想学习怎样用。
I will be very glad when I receive the letter.
如能接到你的来信，我将会非常高兴。
Zhang Jun did best of all.
张军在三人中跳得最高。