1.  aperture
2.  bore diameter

• 1. 孔径: aperture | pore diameter | Bore | pore size
• 2. 数值孔径: numerical aperture | NA | numericalapertureNA | numericing aperture
• 3. 合成孔径雷达: Synthetic Aperture Radar | SAR | Synthetic Aperture Radar-SAR | SAR-Synthetic aperture radar

更多释义

• 1.分辨率是指图像上更大的孔径或开口处的精确和清晰的细节。
  Resolution refers to precise and sharp details on images which are better of larger apertures, or openings.
  dict.yoduao.com
• 2.合成孔径雷达技术将提高雷达能力。
  The synthetic aperture radar technology will increase the radar \ 's capability.
  dict.yoduao.com
• 3.这是指望远镜的焦距与其孔径的比值。
  This is the ratio of the focal length of the telescope to its aperture.
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