| 释义 |
demonstrator|ˈdɛmənstreɪtə(r)|
[ad. L. dēmonstrātor, agent-n. from dēmonstrāre to demonstrate; partly after F. démonstrateur, 14th c, in Hatzf. (So pronounced by Smart 1836; Walker gave deˈmonstrator in the general sense, demonˈstrator in the technical.)]
1. One who or that which demonstrates, points out, or proves.
1611Cotgr., Demonstrateur, a demonstrator; one that euidently shewes, plainely declares, perspicuously deliuers things. 1666J. Smith Old Age 66 (T.) The instruments of them both are the best demonstrators of human strength. 1775Johnson Tax. no Tyr. 2 The demonstrator will find, after an operose deduction, that he has been trying to make that seen which can be only felt. 1825Coleridge Aids Refl. (1848) I. 140 In all these demonstrations the demonstrators presuppose the idea or conception of a God.
2. One who exhibits and describes specimens, or performs experiments, as a method of teaching a science; an assistant to a professor of science, who does the practical work with the students.
1684Ray Corr. (1848) 139 [A book] to facilitate the learning of plants, if need be, without a guide or demonstrator. 1758J. S. Le Dran's Observ. Surg. Introd. (1771) 5 Six Demonstrators in Surgery, at the Amphitheatre of St. Cosme. 1792A. Young Trav. France 137 Mr. Willemet, who is demonstrator of botany, shewed me the botanical garden. 1887Men of the Time 234 He [Sir Andrew Clark] was demonstrator of anatomy to Dr. Robert Knox.
3. One who takes part in a public demonstration.
1870Daily News 9 Oct., Another demonstration took place to urge the Government not to make peace..An evasive answer was given to these demonstrators. 1890Times 13 Feb. 5/2 The demonstrators..assembled in front of the statue of Henry IV, in order to place a wreath on it.
4. ‘The index-finger’. Syd. Soc. Lex.
Hence ˈdemonˌstratorship, the office or position of a scientific demonstrator.
1870Athenæum 14 May 642 A Syndicate..recommended the establishment of a Professorship and Demonstratorship of Experimental Physics.
Add:[2.] b. One who demonstrates the operation or use of a product, esp. to a prospective buyer.
1939C. Isherwood Goodbye to Berlin 243 In the hardware department, an overalled woman demonstrator was exhibiting the merits of a patent coffee-strainer. 1987Desktop Publishing Today July 16/2 The best demonstrator cannot possibly cater for all possible circumstances.
5. A motor vehicle in which a prospective buyer may take a test drive; a demonstration model. orig. U.S.
1930Amer. Speech VI. 92 The following expressions have to do with automobiles and their accessories:..demonstrator. 1934J. O'Hara Appointment in Samarra (1935) i. 23 It was a demonstrator, and would be driven by Julian English, the Cadillac distributor. 1968Globe & Mail (Toronto) 3 Feb. 46/2 (Advt.), Fairlane convertible, low mileage demonstrator. 1976Milton Keynes Express 28 May 49/1 (Advt.), Peugeot 504 Diesel Saloon... As new, our own demonstrator car would cost new over {pstlg}3,550. 1983Truckin' Life Aug. 65/2 The truck..had done 30,000 km as a demonstrator. |