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focal length 名词

focal length

焦距 jiāojù

单语范例（未经PONS编辑处理）

英语

Note that computing the focal length requires that the light-refracting properties of the liquids in the eye are taken into account. en.wikipedia.org

Each radar range yields a zone plate strip with a focal length proportional to that range. en.wikipedia.org

The field of view has a 35 mm equivalent focal length of 24136mm. en.wikipedia.org

The objective diameter of the telescope is 6.5 inches and it has a focal length of f/13.5. en.wikipedia.org

At its simplest, it is a very high-powered magnifying glass, with very short focal length. en.wikipedia.org

The focal length is positive for a concave mirror, and negative for a convex mirror. en.wikipedia.org

However, it may not always be visible, except at the widest end (the shortest focal length). en.wikipedia.org

The density of the liquid, for example, has no effect on the focal length of the paraboloid. en.wikipedia.org

It has a 70 cm diameter primary mirror and a focal length of 46 m. en.wikipedia.org

The curvature of field is determined by the sum of the dioptres, but the focal length is not. en.wikipedia.org

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