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heliograph英英字典_heliograph剑桥英语解释_heliograph柯林斯英文解释_果味酸柯林斯词典
果味酸柯林斯词典

heliograph

H 开头单词

柯林斯词典

    heliograph /ˈhiːlɪəʊˌɡrɑːf, -ˌɡræf/

  • 1. N an instrument with mirrors and a shutter used for sending messages in Morse code by reflecting the sun's rays 太阳光度计

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