Polyprotic acid
[化] 多元酸
🧩 词语组成解析
🗣️ 情景例句
And where do you live?
你们住在哪？
I cannot afford two days off a week.
我忙得无法一星期抽出两天休假。
If you want to send a letter to an office abroad that is in a different time zone, you can send a fax, and it will be received even though the office is not open.
如果你要寄信到不同时区的国外办公室，你可以发个传真，即使办公室不开门，信也会被收到。