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watermarks是什么意思？

watermarks

例句
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柯林斯高阶英汉双解学习词典释义
  • N-COUNT
    水印（常用于钞票上以防伪）
    A watermark is a design which is put into paper when it is made, and which you can only see if you hold the paper up to the light. Banknotes often have a watermark, to make them harder to copy illegally.