I am reading a book to explain factorial.
n! = n*(n-1)*(n-2)....3*2*1
factorial阶乘, I am enlightened to see its meaning literally.
Since Factor is 乘数, So factorial should 阶乘.
How to describe such a situation?
"顾名思义"? 从字面上理解? 从拼写上理解?
I assume 顾明思议 a bit better but merely not grasp the idea thoroughly.
Are there some better phases?