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
I do.
我愿意。
I'm going to use three pounds.
我要用三磅。
But the copy he gave him had not been written out in full as usual.
但这回狱卒给贵族的信没有像往常那样把全文写全，