hourglass worm wheel

例句：

1. 1. The hourglass worm wheel is a fascinating mechanism that demonstrates the power of natural selection.
   漏斗形蠕虫轮是一个令人着迷的机制，展示了自然选择的力量。
2. 2.The hourglass worm wheel was used to measure the speed of water flow in ancient times.
   漏斗形蠕虫轮在古代被用来测量水流的速度。
3. 3.The hourglass worm wheel is often used as a teaching tool for children to understand the concept of time and motion.
   漏斗形蠕虫轮常常被用作教学工具，帮助孩子们理解时间与运动的概念。