coherent subtraction
相干相减，相干相消

• inertia of photo
• ineterceptor
• inexactness
• infidelity
• infiltration
• infinite
• infinite ray
• infinite series
• infinitesimal
• infinitesimal calculus
• infinitesimal geometry
• infinite-strip curve mirror
• infinity
• infintie object point
• inflammability
• inflexibilty
• inflexion
• inflexion point
• influence
• influence electricity
• information
• information bit
• information capacity
• information carrier
• information channel