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demonstrator    音标拼音: [d'ɛmənstr,etɚ]
n. 论证者,证明者,指示者,示威者

论证者,证明者,指示者,示威者

demonstrator
n 1: a teacher or teacher's assistant who demonstrates the
principles that are being taught
2: someone who demonstrates an article to a prospective buyer
[synonym: {demonstrator}, {sales demonstrator}]
3: someone who participates in a public display of group feeling
[synonym: {demonstrator}, {protester}]

Demonstrator \Dem"on*stra`tor\ (?; 277), n. [L.: cf. F.
d['e]monstrateur.]
1. One who demonstrates; specif.
(a) one who proves anything with certainty, or establishes
it by indubitable evidence.
(b) one who shows how a certain device operates or a
procedure is performed.
[1913 Webster]

2. (Anat.) A teacher of practical anatomy.
[1913 Webster]

3. a person who participates in a demonstration[7].
[PJC]


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