Optional arguments could be added after the text string to specify the comment introducer, the character used as the "box," and the width of the comment.
可选参数可以添加在文本字符串之后，用来指定评论人，用作 “框” 的字符，以及评论的宽度。
If the optional start is specified, it indicates the character position in the source-string at which the search is to begin.
如果指定了可选的起始位置，则表明它是源字符串中开始进行搜索的字符位置。
Optional parameters may include information such as character set encoding or language.
可选参数可能包含诸如字符集编码或语言等信息。
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