Falling factorial
[计] 递降阶乘
🧩 词语组成解析
a. 落下的, 坠落的, 下降的\\n[化] 消胀
factorial
['fæktɔ:riəl]
adj. 因子的，阶乘的;
n. 阶乘积，阶乘;
🗣️ 情景例句
Well, I didn't really exercise.
嗯， 我没有真的上健身课。
What's eating you?
怎么搞的？
I'm thinking of hanging the lamp from the ceiling.
我打算把灯吊在天花板上。