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
and his book
他的书
Omelets are not made without breaking eggs.
有失才有得。
There is a table in the room.
客厅里有张桌子。