hour wheel driving wheel

例句：

1. 1. The clock on the wall is an hour wheel.
   墙上的钟是一个小时表。
2. 2. She used to keep a minute wheel in her pocket.
   她过去常把一个分钟表放在口袋里。
3. 3. The hour wheel on the car shows the time.
   汽车上的小时表显示了时间。