Our class has a study group after school.
我們班放學後有讀書團體。
There are three groups for the science project.
這次科學專題分成三個團體。
I joined a volunteer group last summer.
我去年夏天加入了一個志工團體。
A group of students is cleaning the classroom.
一群學生正在打掃教室。
Each group will present its idea today.
每個團體今天都要報告他們的想法。