Common difference
公差
🧩 词语组成解析
common
['kɑmən]
adj. 普通的;通俗的;[数学]公共的;共有的;
n. [法律]（对土地、水域的）共有权;公共用地;普通;平民;
🗣️ 情景例句
Well, I will leave you two to talk.
嗯 ，我走开，你们谈吧。
A watched pot is long in boiling.
心急水不沸。
How long have you been at this school?
你到这学校有多么时间了？