The study of vibration is concerned with the oscillatory motions of bodies and the forces associated with them. 振動(dòng)的研究涉及到物體的振蕩運(yùn)動(dòng)以及與此有關(guān)的力。
Light is an oscillatory thing with a definite frequency that is related to the wavelength. 光是一種以確定頻率振動(dòng)的東西，這一頻率與波長(zhǎng)有關(guān)。