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point source英英字典_point source剑桥英语解释_point source柯林斯英文解释_欧米惠必应词典
欧米惠必应词典

point source

P 开头单词

柯林斯词典

    point source

  • 1. N a source of light or other radiation that can be considered to have negligible dimensions 点光源[optics]

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