名词
中文翻译：阻塞字母
同义词：
['block character', "block character例句：1. The programmer was able to block the letter 'X' in the code.（程序员能够阻止代码中的字母'X'。）"]
例句：
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1. The programmer was able to block the letter 'X' in the code.
程序员能够阻止代码中的字母'X'。
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2. The teacher blocked the letter 'B' from being printed on the blackboard.
老师阻止了字母'B'在黑板上打印出来。
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3. The student tried to block the letter 'O' from being typed into the computer.
学生试图阻止字母'O'被输入到电脑中。