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单词 invisible ink
释义

invisible ink

noun [mass noun]
A type of ink used to produce writing that cannot be seen until the paper is heated or otherwise treated.Visitors to the open day were able to try their hand at a series of techniques such as passport forgery, code-breaking and writing in invisible ink....
  • Peggy wrote in invisible ink, literally between the lines of innocent letters, she wrote the troop movements, the intelligence that the British were paying for.
  • Ben is quick to deduce that the map to the treasure is inscribed in invisible ink of the back of the American Declaration of Independence.
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更新时间:2024/12/23 23:33:40