/ˈtrævl ||; ˈtrævḷ/noun1 [U] the action of going from one place to another 旅行: air/rail/space travel 航空╱铁路╱太空旅行a travel bag/clock/iron (= designed to be used when travelling) 旅行袋；旅行用闹钟；旅行用熨斗
2 travels [pl] time spent travelling, especially to places that are far away 旅游（尤指到远处的） ☞ Travel is an uncountable word and you can only use it to talk about the general activity of moving from place to place Foreign travel is very popular these days. When you talk about going from one particular place to another, you use journey. A journey can be long the journey across Canada or short, but repeated the journey to work. A tour is a circular journey or walk during which you visit several places. You may go on a tour round a country, city, place of interest, etc a three-week tour around Italy a guided tour of the castle. You often use trip when you are thinking about the whole visit (including your stay in a place and the journeys there and back) They're just back from a trip to Japan. They had a wonderful time. (but ‘How was the journey back?’ ‘Awful -- the plane was delayed!’) A trip may be short a day trip, or longer a trip round the world, and can be for business or pleasure How about a shopping trip to London this weekend? He's on a business trip to New York to meet a client. An excursion is a short organized trip that you go on with a group of people The holiday includes a full-day excursion by coach to the capital. You go on a journey/tour/trip/excursion. travel是不可数名词，只用于泛指由一地前往另一地：Foreign travel is very popular these days.到外国旅行现在很普遍。由某地方前往另一个地方，用journey。journey可以指长途旅程：the journey across Canada横越加拿大的旅程；也可以指重复的短途旅程：the journey to work上班的路程。tour指周游或到几个地方游览，可用于游览国家、城市、名胜等：a three-week tour around Italy三星期意大利游·a guided tour of the castle在导游带领下参观城堡。trip常用于指整个旅行（包括逗留的时间及来回的旅程）﹕They're just back from a trip to Japan. They had a wonderful time. 他们刚去日本回来，玩得很愉快。（但是：‘How was the journey back?’ ‘Awful -- the plane was delayed!’“返程怎么样？”“糟透了，飞机误点了！”）trip可以指短途旅行：a day trip一天的旅游；也可以指较长途的旅行：a trip round the world环游全世界；同时也可以指为公干或游玩的旅行：How about a shopping trip to London this weekend? 这个周末去伦敦购物旅行如何？·He's on a business trip to New York to meet a client.他到纽约见客户去了。excursion指为一群人安排的短途旅行：The holiday includes a full-day excursion by coach to the capital.度假活动包括乘长途汽车游首都一天。我们用go on a journey／tour／trip／excursion。