timer

• 用于测量或控制时间间隔的装置或人，通常在时间结束时发出信号或在设定时间激活某个机制。

A device or person that measures or regulates a specific time interval, often signaling its end or activating a mechanism at set times.

1. Time-measuring deviceA2formal

   A device that measures a specific time interval and signals when it ends.

   计时器

   • She set the timer for 10 minutes to boil the eggs.
   • The oven timer beeped when the cake was ready.
   • He used a timer to track his workout intervals.

2. Sports officialB1formal

   An official who records the time taken in a race or competition.

   计时员

   • The timer started the stopwatch as the runners left the blocks.
   • An official timer is required for all championship events.
   • The timer announced the final lap time.

   同义词timekeeper

3. Automatic regulatorB1formal

   A mechanism that automatically turns a device on or off at predetermined times.

   定时器

   • The sprinkler system is controlled by a timer.
   • A timer on the lights makes the house look occupied.
   • The coffee maker has a timer for brewing in the morning.

   同义词time clocktime-switch