Quadrivalency
n. 四价
🗣️ 情景例句
Can you arrange an interview for tomorrow?
你可以安排在明天面谈吗？
Do you want to remit the money by air mail or by cable, sir?
您想要航空信还是电汇，先生？
The petrol had nearly all been used up.
汽油几乎已经用光。