fast: applies particularly to a moving object: a ~ horse.


rapid: emphasizes the movement itself: a ~ current.


swift: suggest great rapidity coupled with ease of movement: returned the ball with one ~ stroke.   （歌词有句hope is like a summer bird, too swiftly flown away希望就象夏天的小鸟，转眼飞走不见）


fleet: adds the implication of lightness and nimbleness: ~ runners.   （nimble轻快轻松implies light and swift action，如a nimble tennisplayer一个轻快的网球手）


quick: suggests promptness and the takingof little time: a ~ wit.   （prompt立即无延迟immediately, without delay, 如he would have died but for the prompt action of two ambulance men要不是两名救护人员立即行动，他可能早就死了）


speedy: implies quickness of successful accomplishment and may also suggest unusual velocity: a ~ recovery.   （velocity速度: 物理中的速度，如匀加速公式v(t)=v(0)+at）


hasty: suggests hurry and precipitousness and often connotes carelessness and resultant confusion and inefficiency: a ~ inspection.   （hurry因着急而快速做事to do with haste，如hurry up and finish your meal赶快吃饭）  （precipitous草率，指缺乏思考，如precipitous intervention贸然介入）


expeditious: suggests efficiency together with rapidity of accomplishment: an ~ processing of a merchandise order.


fast快速: 特指运动的物体，rapid快速: 强调运动本身快，swift快速: 表示快速并且不费劲，fleet轻快: 表示轻快轻松(nimble: swift见上注)，quick快速: 表示立即时间短，speedy快速: 指快速成功完成，或运动速度少见得快，hasty仓促: 表示做事着急仓促，造成混乱低效，expeditious高效快速: 表示效率高速度快


记忆方法: 1）首字母frsfqshe重组成FRESH新QFS起飞时<==快速

         2）快速的意思是移动前进动作快mean moving, proceeding, or acting quickly.   可见本组第5个词quick是基础词