Gb	Eng
公车定期往返于那两个城市之间。	Buses ply between the two cities.
渡船定期往返于英吉利海峡。	Ferryboats ply across the English Channel.
在市中心和飞机场之间有往返的穿梭运行班车。	There is a shuttle service between the city center and the air station.