The first character is a delimiter, so the first item WORD finds is a blank string.

第一个字符是分隔符，所以WORD找到的第一项是一个空字符串。

youdao

The key bit is the top-level extension element x:wsbuffer which provides a stock of blank character content to be used in the replacement operation.

关键是顶层的扩展元素 x:wsbuffer，它提供了替换操作中所使用的空白字符内容。

youdao

The job identifier can contain any non-blank character except slashes (/).

作业标识符可以包含除了斜线（/）之外的所有非空白字符。

youdao

While I applaud Michael Vick for his continued efforts to get his life on track, I am more impressed with the character of Arthur Blank for reaching out to Vick.

FORBES: Michael Vick's Redemption