• 1. focal power: 光焦度 | 焦度 | 倒焦距 | 焦点
• 2. zero focal power corrector: 无光焦度校正器
• 3. non-focal-power aberration compensator: 无光焦度像差补偿器

更多释义

• 1.For example, a telescope with a focal length of 2000mm has twice the power and half the field of view of a 1000mm telescope.
  比如，与焦距为1000mm的望远镜相比，2000mm焦距望远镜的放大率和视场范围分别是前者的2倍和1/2。
  dict.yoduao.com
• 2.By assuming the weak lens focal length expression to be the first term in a power series a simple and accurate formula can be derived for the objective focal length of a magnetic electron lens.
  用假设弱透镜焦距表达式是一个幂级数中的第一项的方法，可以导出相当准确且便于实用的电磁电子透镜物镜焦距公式。
  dict.yoduao.com
• 3.National focal points often have limited authority and very little access to a country's true power base.
  国家归口单位的权限往往十分有限，极少可以接近国家的真正权力基础。
  dict.yoduao.com

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