time totalizer

例句：

1. 1. The time totalizer on the desk is showing that we have only 20 minutes left.
   桌上的时间总计器显示我们只剩下20分钟了。
2. 2. She used the time totalizer to calculate how much she spent on groceries.
   她用时间总计器计算了她在杂货上的花费。
3. 3. The teacher asked the students to use their time totalizers to record their homework completion.
   老师要求学生们使用他们的计时器记录他们的家庭作业完成情况。