I am reading a book to explain factorial.

n! = n*(n-1)*(n-2)....3*2*1 

Decompose word 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?

  • I think this is just a way to construct English words. Curious to know what other people say.
    – sylvia
    Oct 27, 2019 at 3:00
  • I don't understand the question. :(
    – dan
    Oct 27, 2019 at 3:29
  • 1
    I think the question is motivated by how 阶乘 = "step multiplication" defines itself, and we're asking if there's a way to describe this property other than 顾名思义. (Maybe 明 is a typo for 名?)
    – Becky 李蓓
    Oct 27, 2019 at 5:17
  • ty, I modified '顾名思义' @Becky李蓓
    – AbstProcDo
    Oct 27, 2019 at 6:26
  • 1
    I believe you mad a typo: n! = n*(n-1)*(n-2)....3*2*2 -> n! = n*(n-1)*(n-2)....3*2*1
    – tsh
    Nov 1, 2019 at 6:34

3 Answers 3


What I can think of is: 逐字理解 or 按字面意思理解.

  • I got an idea "说文解字', so '拆字解字' might be an option.
    – AbstProcDo
    Oct 27, 2019 at 6:38
  • @Algebra those are not suitable because 拆字解字 is used to describe the action itself, not a way to understand.
    – dan
    Oct 27, 2019 at 6:45





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