external socket

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，这是一个外部位置。
2. 2. The research team was working on a project that involved an external partner.
   研究团队正在处理一个涉及外部合作伙伴的项目。
3. 3. The external wall of the building is made of brick and has a height of 5 meters.
   这座建筑的外墙是用砖砌成的，高度为5米。