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rad英英字典_rad剑桥英语解释_rad柯林斯英文解释_按摩法牛津词典
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rad

R 开头单词词源字典

柯林斯词典

    rad /ræd/

  • 1. N a former unit of absorbed ionizing radiation dose equivalent to an energy absorption per unit mass of 0.01 joule per kilogram of irradiated material. 1 rad is equivalent to 0.01 gray 拉德(吸收辐射剂量单位)


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  • N

  • 1. SYMBOL for radian 弧度

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剑桥词典