名词
中文翻译：非打印字符
同义词：
['non-printable character', 'non-printed character']
例句：
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1. Thecomputer uses a non-printing character to represent the number zero.
计算机使用一个非打印字符来表示数字零。
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2.The printer used a non-printing character to print the document.
打印机使用了一个非打印字符来打印文档。
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3. The data was saved as a non-printing character in the database.
数据以非打印字符的形式保存在数据库中。