英语词汇“focal aperture”的意思、释义、用法解释及翻译-春雷网

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词汇	focal aperture
释义	Definition of focal aperture in English: focal aperture noun Optics Photography 1The aperture at the focal plane of a telescope or other optical instrument (now rare). 2A measure of the light-collecting power of a lens, telescope, etc. Origin Mid 19th century; earliest use found in The Civil Engineer and Architect's Journal. Definition of focal aperture in US English: focal aperture noun Optics Photography 1The aperture at the focal plane of a telescope or other optical instrument (now rare). 2A measure of the light-collecting power of a lens, telescope, etc. Origin Mid 19th century; earliest use found in The Civil Engineer and Architect's Journal.
随便看	breakneck break-neck breaknecking break neck to do something break new ground break new (or fresh) ground break new (or fresh) ground break of day break of day break off break-off break off break off break off one's relationship with break off relations with break of serve break one's back break one's back break one's duck break one's duck break one's heart break one's journey break one's neck to do something break one's neck to do something break one's promise

　

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