1N-COUNT 阐述者;拥护者;倡导者 An exponent of an idea, theory, or plan is a person who supports and explains it, and who tries to persuade other people that it is a good idea. 阐述者;拥护者;倡导者 [formal]
...a leading exponent of test-tube baby techniques. [+ of]
试管婴儿技术的主要倡导者
2N-COUNT 擅长者;大师;行家 An exponent of a particular skill or activity is a person who is good at it. 擅长者;大师;行家
...the great exponent of expressionist dance, Kurt Jooss. [+ of]