These are all words for an act of travelling to a place. 以上各词均指旅行、旅游。

trip

an act of travelling from one place to another, and usually back again 通常指往返的旅行:

a business trip

出差

a five-minute trip by taxi

五分钟的出租车车程

journey

an act of travelling from one place to another, especially when they are a long way apart 尤指长途旅行:

a long and difficult journey across the mountains

漫长而艰难的翻山旅行

tour

a journey made for pleasure during which several different places are visited 指游览多地的旅行、旅游:

a tour of Bavaria

巴伐利亚之旅

expedition

an organized journey with a particular purpose, especially to find out about a place that is not well known 指远征、探险、考察:

the first expedition to the South Pole

首次去南极的探险

excursion

a short trip made for pleasure, especially one that has been organized for a group of people 尤指集体远足、短途旅行:

We went on an all-day excursion to the island.

我们到岛上去游览了一整天。

outing

a short trip made for pleasure or education, usually with a group of people and lasting no more than a day 指集体出外游玩或学习,通常不超过一天:

The children were on a day's outing from school.

孩子们离校游览了一天。

day out

a trip to somewhere for a day, especially for pleasure 指一日游:

We had a day out at the beach.

我们在海滩玩了一天。

常用搭配

to go on a(n) trip / journey / tour / expedition / excursion / outing / day out

to set out / off on a(n) trip / journey / tour / expedition / excursion

to make a(n) trip / journey / tour / expedition / excursion

to be away on a(n) trip / journey / tour / expedition

the outward / return / homeward trip / journey

a(n) foreign / overseas / round-the-world trip / journey / tour / expedition

a bus / coach trip / journey / tour / excursion

a train / rail trip / journey / tour / excursion

trip journey tour expedition excursion outingday out用法辨析