常見(jiàn)例句用作名詞 (n.)Planetary gear systems are also used in many automatic transmissions.行星齒輪組也同樣用於許多汽車(chē)變速器中。The indexing cam was in the rear derailleur rather than the shift lever.分度凸輪的是在後方變速器，而不是變速桿。 返回 gear-shift