tour是指为游玩而到几个地方观光的（长途或短途）旅行

journey可以指经常走过的或长或短的距离

how long is your journey to work你上班要走多长的路

travel(复数）指时间稍长的各处旅行,尤其指出国旅游,常常与所有格的形容词连用,she has gone off on her travels again

travel指行走、驾驶或者旅行的不可数名词travel broadens the mind旅行能够使人开阔眼界

trip指短期的旅程和观光during our holiday in Japan we went on a few trips