The reason is that although regular expressions are well suited for removing whitespace from the beginning of a string, they're not as fast at trimming from the end of long strings.
原因是，尽管正则表达式很好地去除了字符串头部的空格，它们却不能同样快速地修剪长字符串的尾部。
The reason is that although regular expressions are well suited for removing whitespace from the beginning of a string, they're not as fast at trimming from the end of long strings.
原因是，尽管正则表达式很好地去除了字符串头部的空格，它们却不能同样快速地修剪长字符串的尾部。
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