Schuler pendulum

例句：

1. 1. The Schuler pendulum is a popular instrument for measuring the Earth's rotation.
   舒勒摆钟是一种流行的仪器，用于测量地球的旋转。
2. 2.The Schuler pendulum was used to determine the length of the day during the ancient Greek era.
   舒勒摆钟在古代希腊时期被用来测定白天的长度。
3. 3.In modern times, the Schuler pendulum is still used in astronomy to measure the speed of planets.
   在现代，舒勒摆钟仍然被用于天文学中，以测量行星的速度。