truncation error
(1)截断误差
(2)舍项误差

• shutter
• shutter between lens
• shutter blade
• shutter-blade arrester
• shutter efficiency
• shutter gear box
• shutter mechanism
• shutter opening angle
• shutter release button
• shutters
• shutter speed coupling pin
• shutter speed dial
• shutter speed priority automatic exposure camera
• shutter speed setting ring
• shuttle
• side arm
• sideband
• sideband image
• sideband interference
• sideband modulation
• side beam mirror
• side elevation
• side emission
• side illumination
• side light