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arc sec英英字典_arc sec剑桥英语解释_arc sec柯林斯英文解释_沉淀汉英词典
沉淀汉英词典

arc sec

A 开头单词

柯林斯词典

    arcsec /ˈɑːksɛk/ (also arc second)

  • 1. N of a degree of an angle 角秒; 一度的三千六百分之一

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