class mid-point

例句：

1. 1. The teacher asked the students to find the class mid-point on the blackboard.
   老师要求学生们在黑板上找到班级中点。
2. 2.The class mid-point is where the average score of all students is calculated.
   班级中点是计算所有学生平均分的地点。
3. 3.The class mid-point is often used as a reference point for measuring student performance.
   班级中点常被用作衡量学生表现的参考点。