Quaternaries
[化] 季盐; 季铵盐类
🗣️ 情景例句
How about next Saturday?
下周六如何？
I can't express myself very well in English.
我不能很好地用英语表达自己。
Can you imagine how much he paid for that car?
你能想象他买那车花了多少钱吗？