Factorial sign
[计] 阶乘号
🧩 词语组成解析
factorial
['fæktɔ:riəl]
adj. 因子的，阶乘的;
n. 阶乘积，阶乘;
🗣️ 情景例句
Your son?
你的儿子？
It's a deal!
成交！
It really looks good on you.
穿在你身上真是好看。