They act as an intermediary transducer, much as a tuning fork which when struck, and then being brought into proximity of another tuning fork, will start the second fork to begin vibrating also.
They act as an intermediary transducer, much as a tuning fork which when struck, and then being brought into proximity of another tuning fork, will start the second fork to begin vibrating also.
他们担当了中间媒介变换器角色，非常像受了敲击的音叉，紧接着就引起了另一个音叉的共鸣，就会引起第二个音叉也同样开始振动。