Python Standard Library is a thin volume — 281 pages in physical size, but more lines of the books are taken up with source code and vertical whitespace than with prose description.

Python Standard Library很薄—这本书厚281页，但是源代码和垂直空白所占据的行数超过文字描述。

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However, tags can be hard to parse visually, especially if the XML producer does not arrange vertical and horizontal whitespace to make it easier.

但是，标记很难可视地进行解析，特别是在XML编写者没有为便于解析而排列垂直和水平空白的情况下。

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