| 释义 |
derailleur|dəˈreɪljə(r), dɪ-, -lə(r)|
Also ‖ dérailleur |derɑjœr|.
[ad. F. dérailleur (Trésor, 1927), f. dérailler derail v.]
A bicycle gear in which the ratio is changed by switching the line of the chain (while pedalling) so that it jumps to a different sprocket on the rear wheel. Also derailleur gear.
1930Cycling 11 Apr. 337/1 The Derailleur system of multi-speed gearing is..well-tested..on the Continent, but comparatively new to this country... The gear works by ‘de-railing’ the chain from one back sprocket to another of different size, thus giving a different gear. 1950Chambers's Encycl. II. 307/2 The most popular variable gear in Great Britain is the 3- and 4-speed hub gear... On the Continent and in America the dérailleur-type gear is more favoured. 1959Elizabethan Apr. 35/1 My lightweight bike with 4-speed hub gear, which is not so vulnerable as the derailleur. 1975Which? May 140/3 All our drop handlebar bikes..had derailleur gears. 1984N.Y. Times 23 Sept. v. 2/1 The whir of well-oiled machinery is interrupted only by decisive clinks as derailleurs move chains to a lower gear for the long, steady climb over the terminal moraine. |