on the hour

• 在整点时刻

on the hour的用法和样例：

例句

1. Father must take his pill on the hour.
   父亲必须在每点钟准点吃药丸。
2. On July third; every hour on the hour.
   在七月三日这一天; 时时刻刻
3. He arrived on the hour.
   他准时到达。
4. The London bus departs every hour on the hour.
   伦敦的公共汽车每小时零分开出一趟。