/ɪk'spəʊnənt; ɪk`sponənt/
n
1 person or thing that explains and supports a theory, belief, cause, etc （理论、信仰、事业等的）倡导者, 拥护者
*an exponent of free trade 自由贸易的拥护者
* Huxley was an exponent of Darwin's theory of evolution. 赫胥黎是达尔文进化论的鼓吹者.
2 person able to perform skilfully a particular activity （某种活动的）能手
*the most famous exponent of mime 最着名的哑剧表演大师
* She's a practised exponent of the sport of water-skiing. 她是滑水运动健将.
3 (mathematics 数) figure or symbol that shows how many times a quantity must be multiplied by itself 指数; 幂
*In a3, the figure
3 is the exponent. a3中的3是指数.
* In xn, the symbol n is the exponent. xn中的n是指数.

n[C]
[Date: 1500-1600; Language: Latin;Origin: , present participle of exponere; EXPOSE]
an exponent of an idea, belief etc tries to explain it and persuade others that it is good or useful
exponent of
　a leading exponent of desktop publishing
an exponent of a particular skill, idea, or activity is someone who is good at it
exponent of
　The most famous exponent of this approach to art was probably Charles Rennie Mackintosh.
technical a sign written above and to the right of a number or letter to show how many times that quantity is to be multiplied by itself