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
I would like to buy some stamps, please.
我想买些邮票。
I'm easy to please.
我很容易相处。
She's been there for two months. She's been there since September.
她进校有两个月了。她自9月份起便在那儿学习了。