imurity-to-impurity transition
杂质-杂质跃迁

• photo-optical receiving unit
• photo-optical tacking data
• photo-optics
• photooxidation
• photooxygenation
• photooxygenation actinometer
• photopeak
• photopen recorder
• photoperiod
• photoperspectograph
• photophase
• photophobia
• photophone
• photophor
• photophoresis
• photophysics
• photopia
• photopic eye
• photopic range
• photopic vison
• photoplane
• photoplastic effect
• photoplastic material
• photoplastic recording
• photoplate