基本解释n.变速器同根派生 英汉例句用作名词 (n.)Planetary gear systems are also used in many automatic transmissions.行星齿轮组也同样用于许多汽车变速器中。The indexing cam was in the rear derailleur rather than the shift lever.分度凸轮的是在后方变速器，而不是变速杆。