用法:
1 narrow opening 窄孔; 隙缝.

用法:
2 (size of an) adjustable opening for admitting light into a camera （照相机的）光圈孔径（大小）:
What aperture are you using? 你使用多大的光圈?

• nonskid
• nonthreatening
• nontraditional
• nonverbal
• nonviable
• nonviolent
• nonviscous
• noose
• norm
• normative
• nosedive
• nosegay
• nostalgia
• nostalgic
• nostrum
• notability
• notch
• notched
• noteworthy
• noticeable
• notify
• notoriety
• notorious
• nova
• novelettish