tuning fork clock

例句：

1. 1. The tuning fork clock on the wall is a reminder of the passage of time.
   墙上的调音叉钟是时间流逝的提醒。
2. 2. He set up his tuning fork clock in the garden to keep track of the hours.
   他在花园里设置了一个调音叉钟，用来计时。
3. 3. The old man used to tune his tuning fork clock every morning before he went to bed.
   这位老人以前每天早上都会用调音叉钟来校准时间，然后才去睡觉。