task force
noun [ C usually singular ] uk/ˈtɑːsk ˌfɔːs/ us/ˈtæsk ˌfɔːrs/
特别工作组;特遣部队
a group of people who are brought together to do a particular job, or a large military group who have a military aim to achieve
Retired teachers have formed a task force to help schools in the area. 退休教师组成了一个特别工作组，为该地区的学校提供帮助。