单词	ratio of gear
释义	ratio of gear 齿轮速比
随便看	four star four star,four-star four-star general four - star general fourstars four-stars four-start four-start spiral four-start worm four start worm four-state four-state tube four-step four step heat treatment four-step heat treatment four step rule four-storey four-storeyed four-storeys fourstory four story fan four-strand four strand continious casting machine four-strand double crossing over four strand double crossing over 涩涩1 涩3 涩4 涩于言论涪涫涬涭涮つちくさい【土臭い】つちくれつちくれ【土塊】つちぐもつちぐも【土蜘蛛】つちけいろつちけいろ【土気色】つちけむりつちけむり【土煙】つちつかず