The simplest form of wave motion consists of the combination of a transverse simple harmonic vibration and a uniform translation. 波動(dòng)的最簡(jiǎn)單形式是橫向簡(jiǎn)諧振動(dòng)和勻速直線(xiàn)運動(dòng)的組合。
A body at rest remains at rest, and a body in motion moves with uniform speed in a straight line, unless a force acts on it. 如無(wú)外力作用，靜止的物體始終靜止，運動(dòng)的物體一直作勻速直線(xiàn)運動(dòng)。
