难以除去初始文档中的重复空格。
Troublesome to remove duplicate Spaces in the original document.
endElement除去重复空格。
用一个空格或一个给定字符替换所有重复空格、换行和制表符。
This replaces all repeated Spaces, newlines and tabs with a single space, or with a supplied string.
这意味着标题之间的空格和目录引用的页号会用重复的点填充。
This means that the Spaces between the bookmark title and the referenced page number on the table of contents are repetitiously filled with the dot character.
游戏由9个小宫格组成，读者需要在每个空格填上1至9的数字，但每一行（直）、每一列（横）和每个小宫格里的数字不能重复。
The challenge is to fill in the numbers 1 to 9 without repeating any number in each row, column, and 3x3 box.
游戏由9个小宫格组成，读者需要在每个空格填上1至9的数字，但每一行（直）、每一列（横）和每个小宫格里的数字不能重复。
The challenge is to fill in the numbers 1 to 9 without repeating any number in each row, column, and 3x3 box.
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