photon flux density

例句：

1. 1. The photon fluxdensity of the light source is very high.
   光源的光子通量密度非常高。
2. 2. Thephoton flux density measurement is crucialfor the detection of radiation.
   光子通量密度测量对于辐射检测至关重要。
3. 3. The photon flux density of the solar spectrumis measured using a spectrometer.
   太阳光谱的光子通量密度通过光谱仪进行测量。