GbEng
耳膜的振动帮助声音传送到大脑。 A vibrating membrane in the ear helps to convey sounds to the brain.
中央C音相当於每秒钟振动256次. Middle C is equivalent to 256 vibrations per second.
他告诉我说中央C音相当于每秒振动256次。 He told me that middle C is equivalent to 256 vibrations per second.
振动在一个平衡位置附近一个粒子或弹性固体迅速的直线运动 A rapid linear motion of a particle or of an elastic solid about an equilibrium position.