令牌通常由字母数字串组成，并以特定的 +\ 序列结束。

Tokens typically consist of an alphanumeric string, ending with a special +\ sequence.

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将指定起始位置和结束位置之间的可编辑字元范围取代成指定字串，然后输出移除位置和描述性资讯。

Replaces a range of editable characters between the specified starting and ending positions with the specified string, and then outputs the removal position and descriptive information.

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判断字串是否以特定字尾结束。

Determines whether a string ends with a specific suffix.

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