balance jewel hole

例句：

1. 1. The scales on the scales are always in balance.
   秤上的秤砣总是平衡的。
2. 2. He balanced his checkbook carefully before he left the office.
   他离开办公室前仔细核对了他的支票簿。
3. 3. The teacher balanced the class by assigning different tasks to each student.
   老师通过分配不同的任务给每个学生来平衡班级。