When an atom shoots out a photon of light, it recoils like a gun. 原子发出光子时，会象枪一样地反冲。
The mass-loss includes the light radiation and solar wind. 太阳质量损失包括光子辐射和太阳风造成的质量损失。
But most of the drugs has tew fluorescence quantum yield, so some reagents must be added to produce fluorescence. 间接测定法是由于大部分药物本身无荧光或者在水溶液中的荧光量子产率低，无法直接测定药物荧光，必须通过加入其它试剂提高药物的荧光量子产率而建立的荧光分析法。
Ordinarily, random thermal jigging of the molecules prevents sound waves from behaving analogously to light quanta. 通常，分子的随机热运动，会让声波的行为和光量子有别。
