名词 speedway:

1. road where high speed driving is allowed

2. a racetrack for racing automobiles or motorcycles

speedon.速率计；速度计=speedometer.speedn.速度；迅速v.加速；急行speed wrench快速扳手speed limits主线限速speed tester测速仪speed camera路旁超速摄像机speed device转台speed object速度目标值speed radius速度半径speed-downn.减速speed skiing速度滑雪speed stable速度稳定的