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单词 coelostat
释义

coelostat /sēˈlō-stat/

noun

An astronomical instrument consisting of a clock-driven mirror on an axis parallel to the earth's, so that light is reflected continuously from a celestial body such as the sun onto a telescope

ORIGIN: L caelum (misspelt coelum) sky, and Gr statos fixed
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更新时间:2024/11/14 19:23:19