So for fixed record formats, you'll get the entire record, including trailing blanks.
因此，对于固定记录格式，会获得整个记录，包括末尾的空白。
You can remove trailing blanks from a file by using the s command and substituting a null replacement.
通过使用s命令并替换一个空替换字符，您可以删除尾随空格。
The rest of the expression is used to see if the value (without leading or trailing blanks) is an empty string.
表达式的其余部分用来检查值(去掉头尾的空格之后)是否是空字符串。
To determine whether a file or a group of text files has embedded control characters, use these options. For instance, if a file has trailing blanks, you can see them
若要确定某个文件或某一组文本文件是否有嵌入的控制字符，可以使用这些选项。
For ASCII files, you can specify the field delimiter for the file, as well as the escape character, whether trailing blanks should be included, and the encoding for the file.
对于ASCII文件，您可以指定文件的字段分隔符、转义字符、是否应包括尾随空白，以及文件的编码。
For ASCII files, you can specify the field delimiter for the file, as well as the escape character, whether trailing blanks should be included, and the encoding for the file.
对于ASCII文件，您可以指定文件的字段分隔符、转义字符、是否应包括尾随空白，以及文件的编码。
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