当浏览器忙于应付错误和糟糕的编码实践时，加载不仅需要更多时间，还会导致难以调试的错误。
When the browser is fighting errors and bad coding practices, loading not only takes more time but can also lead to difficult-to-debug errors.
此外，顺序通常很重要，但是难以绝对保证在所有情形下编码的次序都是正确的。
On top of that, the order is usually important but it is difficult to be absolutely sure that the sequence coded is the correct order for all cases.
但实际上却很难成功：XML 语法要求支持多种编码和很多难以捉摸的特性，比如 CDATA 节和实体。
In practice it seldom works: XML syntax requires support for multiple encodings and many subtleties, such as CDATA sections or entities.
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