travel/ˈtræv(ə)l/
vi., vt.-ll-; (AmE.) -l-1. 旅行；游历to travel round the world周游世界
They travel to the nearest town on Saturdays for shopping or on Sundays for church.他们在星期六到最近的镇上去购物，星期日去教堂。
2. 走得快，快走We were really travelling when the police caught us.警察抓到我们时，我们正开得飞快。
At what speed is he travelling?他以多快的速度前进？