Likewise, when a file is written to, the next character goes to the end of the file.

同样地，当向某个文件写入时，下一个字符被写到文件结尾。

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By default, the end-of-file string is an underscore (_); if that character is sent as a single input argument, everything after it is ignored.

缺省情况下，文件结束字符串是下划线(_)；如果将该字符作为单个输入参数来发送，则它之后的所有内容将被忽略。

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This method is used to read every character until the end of the file (marked by a -1).

这个方法用来读取文件的每一个字符，一直读到文件末尾（以 -1 为标志）。

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