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单词 burning glass
释义

burning glass

noun
A lens for concentrating the sun’s rays on an object so as to set fire to it.But the city was defended by Archimedes, a greater inventor, whose ‘burning glasses’ and other counter-engines destroyed the attackers' siege engines....
  • If a spherical glass vessel is filled with clear water, it acts like a round burning glass.
  • A glass bowl full of water had been used as a magnifier and burning glass in antiquity.
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更新时间:2024/12/24 10:02:47