vibration ball mill

例句：

1. 1. The vibration of the earth'scrust is responsible for earthquakes.
   地球壳层的振动是地震的原因。
2. 2. Themachine's vibration wasso loud that it woke meup.
   这台机器的震动太吵了，把我吵醒了。
3. 3. The scientistused a device to measure the vibration ofthe ground.
   科学家使用一种装置来测量地面的震动。