Ordinary light, from the Sun or a light bulb, is emitted spontaneously, when atoms or molecules get rid of excess energy by themselves, without any outside intervention.
当原子或分子不受任何外界干涉释放自身多余的能量时，太阳和灯泡本能的发出的普通光。
Ordinary light, from the Sun or a light bulb, is emitted spontaneously, when atoms or molecules get rid of excess energy by themselves, without any outside intervention.
当原子或分子不受任何外界干涉释放自身多余的能量时，太阳和灯泡本能的发出的普通光。
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