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用取火镜使太阳光聚焦在一张纸上 meaning in English

focus the sun's rays on a piece of paper with a burning glass

Related Words

  1. 聚焦
  2. 用曲线分割曲线
  3. 用曲线构成片体
  4. 用取样勺采的样品
  5. 用取样勺采的样品, 勺样
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