speed 
英 [spiːd]  美 [spid] 
n. 速度，速率；快速，迅速

v. 迅速前进，快行；促进；加速，使加速

例句：
Trains will speed through the Channel Tunnel at 186mph. 

火车将以每小时186英里的速度快速穿过海峡隧道。

Eventually, a path was cleared and the car sped away. 

最终，一条道路被清理出来，汽车疾驰而去。

The sheer speed of the unification process took us by surprise. 

统一进程的速度之快令我们大吃一惊。

She answered my letter with remarkable speed. 

她飞快地回复了我的信件。