external language

例句：

1. 1. The company's headquarters are located in the city center, which is an external location.
   公司的总部位于市中心，这是一个外部地点。
2. 2. The research team was working on a project that required them to be outside for several days.
   研究团队正在一个需要他们在外面工作几天的项目上工作。
3. 3. The new building has an external elevator and a glass wall.
   新建筑有一个外部电梯和一个玻璃墙。