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
Will it take long?
要很久吗？
Why are you yelling?
你鬼叫个什么劲儿啊！
Right. They're running and jumping all the time.
对，他们老是跑啊跳的。