iris diaphrams (stops),apertures
虹膜光阑，孔径

• chrominum
• chromising
• chromium ion
• chromium oxide
• chromogen
• chromogenic
• chromogenic reaction
• chromogenic reagent
• chromo-isomerism
• chromo-kisomer
• chromometer
• chromometry
• chromo-optometer
• chromophore
• chromophoric Electrons
• chromophoric group
• chromo-photograph
• chromophotometer
• chromophtography
• chromoscan
• chromoscan densitometer
• chromoscopechromosome
• chromosphere
• chromotron flter
• chromotropism