Anti-tank missiles travel at hundreds of metres a second, so quick reaction times are vital.

反坦克导弹以每秒数百米的速度飞行，因此快速反应时间至关重要。

Building canals later in the Suez and Panama enabled people to not have to sail around the entire continents of Africa and South America which allowed for much quicker travel times.

不久之后，在苏伊士和巴拿马修建的运河使人们不必再绕着整个非洲大陆和南美洲大陆航行，这使得航行时间大大加快。