| 释义 |
ap·er·ture AHD[ăpʹər-chər] D.J.[ˈæpətʃə]K.K.[ˈæpətʃɚ]n.（名词）- An opening, such as a hole, gap, or slit.孔，洞：开口，如洞、缝隙或缺口
- A usually adjustable opening in an optical instrument, such as a camera or a telescope, that limits the amount of light passing through a lens or onto a mirror.光圈：光学仪器上的一个可调开口，如照相机或望远镜，它控制穿过镜头的或到镜面的光的数量
- The diameter of such an opening, often expressed as an f-number.孔径：这种开口的直径，常以f数表示
- The diameter of the objective of a telescope.孔径：望远镜物镜的直径
- Middle English 中古英语
- from Latin apertūra 源自 拉丁语 apertūra
- from apertus [past participle of] aperīre [to open] * see wer- 4源自 apertus aperīre的过去分词 [开，打开] * 参见 wer- 4
apʹertur'al adj.（形容词） |