把東西擺出來的人
這一組講的都是人。差別只在於他用什麼方式把東西擺出來：一個用嘴巴解釋，一個用手上的功夫示範。
noun · C1
Someone who explains an idea, belief or way of doing things in public and argues that it is good or useful, so that other people will accept it too.
倡導者；提倡者
核心畫面
Picture someone taking a thing out of a bag and setting it down on the table where everyone can see it. That act — putting something out in the open so it can be looked at — can be taken as the thread behind exponent. A person can set out an idea by explaining it, or set out a skill by performing it, and in maths a small number is set out above the line to show how many times to multiply.
可以想成有人把一樣東西從袋子裡拿出來，擺在桌上讓大家看。這個「把東西攤開來給人看」的動作，可以當成貫穿 expone…更多收起
可以想成有人把一樣東西從袋子裡拿出來，擺在桌上讓大家看。這個「把東西攤開來給人看」的動作，可以當成貫穿 exponent 的一條線：有人用解釋把想法擺出來，有人用作品把技藝擺出來，而在數學裡，一個小數字被擺到右上角，把「要乘幾次」這件事攤開來給人看。From the word’s history
The source records exponent from Latin expōnēns, the present participle of expōnō (to expose, exhibit, display, set out, explain), itself ex- (out, away) plus pōnō (to lay, place, put). The literal sense of putting something out is what the modern core picture rests on.
資料記的是：exponent 來自拉丁文 expōnēns，是動詞 expōnō 的現在分詞，而 expōnō 由 ex-（向外）加 pōnō（放置）組成，意思包含「展示、擺出來、說明」。今天這個「攤開來給人看」的核心畫面，正是從這個字面來的。
Wiktionary (kaikki:3f6f69a190036ae4:767842254:36136), etymology of exponent (noun)
Two branches
擺在右上角的小數字
這一支不是人，是符號，所以跟前面兩個讀起來距離比較遠。連起來的方式可以想成同一個「擺出來」：把資訊抬高、放到看得見的位置。這是一條幫助記憶的教學連結，資料只支持整個字來自 expōnō，並沒有交代這個數學用法怎麼長出來。
noun · B2
In maths, the small sign written above and to the right of a number or letter, which tells you how many times that number is multiplied by itself. In 2³ the exponent is 3, so the sum is 2 × 2 × 2 = 8.
指數