每日雅思词汇：自行车的结构

bicycle自行车;

tire轮胎;

stem竖管;

tire pump打气筒;

fender挡泥板;

brake lever刹车握把;

rim轮圈;

brake cable闸线;

headlight前灯;

drive chain链条;

front/rear derailleur前/后变速器;

seat post 座杆;

front/rear brake 前/后刹车;

chain stay 后下叉;

seat tube座管;hub轮毂