balance-spring chronometer

例句：

1. 1. The balance-spring chronometer was the most accurate timekeeper in the room.
   这个平衡弹簧计时器是房间里最准确的时间记录者。
2. 2. The antique balance-spring chronometer is now on display at the museum.
   这件古董平衡弹簧计时器现在在博物馆展出。
3. 3. The balance-spring chronometer was used to measure the exact time of the event.
   这个平衡弹簧计时器被用来测量活动的具体时间。