| 单词 |
underdrive |
| 释义 |
ˈunderdrive [under-1 10 b.] An auxiliary speed-reducing gear in a motor vehicle which may be brought into operation in addition to the ordinary gears to provide an additional set of gear ratios.
1929[see overdrive n. 1 a]. 1941Automobile Engineer XXXI. 48/1 Chrysler's new ‘underdrive’ transmission, when coupled with the fluid drive and conventional clutch, is one of the outstanding mechanical innovations of the year. 1981Sunday Express (Colour Suppl.) 4 Oct. /4 (Advt.), The only car with underdrive. |

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