1. The quicker it vibrates, the greater the frequency of sound it produces. 它振动得越快,发出的声音频率就越高。
2. Maybe the ground vibrates, or maybe the ground itself is shifting, tilting. 也许是地面震动了,或者是地面本身在移动和倾斜。
3. So musical instruments evolved in ways that optimize their acoustical properties, how the instrument vibrates and sends those vibration through the air to our eardrums. 因此,乐器的进化优化了它们的声学特性,且优化了乐器振动的方式,并将这些振动通过空气传到我们的耳膜。
4. The house vibrates when a train passes. 火车经过的时候,房子震动。
5. The diaphragm vibrates, thus setting the air around it in motion. 膜片振动, 这使得周围的空气也动荡起来。