multitrack recording
多迹记录；多音轨录音

• amagat
• amateur's camera
• amber lamp
• Ambertian surface
• ambient
• ambient field
• Ambient Light
• ambient light filter
• ambient light illumination
• Ambient Noise
• Ambient Temperature
• ambiguity
• ambiguity function
• ambiguity sensor
• ambiguous point
• ambipolar
• amblyopia
• Ambrotype
• ambulator
• Am-cw laser ranging
• AM Dector
• American Nation Thread
• americium
• amethyst
• amethyst glass