词路径
- entity
- physical entity
- process
- physical process
- phenomenon
- natural phenomenon
- physical phenomenon
- energy
- free energy
- radiation
- electromagnetic radiation
- electromagnetic wave
- nonparticulate radiation
- actinic radiation
- actinic ray
- light
- visible light
- visible radiation
- luminescence
上位词
- brightness
- brightness level
- light
- luminance
- luminosity
- luminousness
- visible light
- visible radiation
下位词
- bioluminescence
- chemiluminescence