(faster, fastest) happening quickly or without delay迅速发生的；立即发生的◆the fastest rate of increase for several years多年来最快的增长率◆a fast response time快速反应时间◆a fast Internet connection高速互联网连接moving quickly; producing or allowing quick movement快的；迅速的；可供快速运动的◆a fast train service特快列车服务◆the fastest route between two cities两城市之间的最快路线  ➡  idiom at hard adj.