timer counter circuit

例句：

1. 1. The clock has a timer that can be set for specific times.
   这个钟有定时器，可以设置特定时间。
2. 2. The timer on the oven will stop cooking when it reaches the end of the recipe.
   烤箱上的定时器会在食谱结束时停止烹饪。
3. 3. The timer on the microwave is very useful for cooking small meals quickly.
   微波炉上的定时器对于快速烹饪小餐非常有帮助。