a journey to a place and back again for business or pleasure, or for a particular purpose （尤指短程往返的）旅行，旅游◆Bill's away on a trip this week. 比尔本周外出旅游了。◆I'm going on a three-day trip to China. 我要去中国旅行三天。
a journey to or back from a place 行程◆The truck was delayed on the return trip. 卡车回程中误点了。◆the outward trip 外出