“客车”和“长途客车”英语怎么写？

carriage 通常是指车厢吧
coach 是BrE“长途客车”的说法
客车 passenger bus
长途客车 coach

客车 carriage
长途客车 coach
客车passenger buses
长途客车 long-distance passenger buses

客车：[coach] [bus] [passenger carriage] [passenger train] [stopping train] [passenger car] [passenger coach]
长途客车：long distance coach(intercity bs)

客车＝Passenger train
长途客车＝Long-distance guest vapour