The parsers behave more like interpreters and are not compilers.
解析器的行为更像解释器，而不是编译器。
This is a notoriously complex specification, to the extent that more than two years after approval there are still only a handfull of parsers on any platform that come close to full compliance.
这是一个相当复杂的规范，以至于在批准之后的两年多时间里，在所有平台上，仍然只有少数几个解析器能接近完全符合规范。
More complex parsers are typically created using these built-in parser objects.
更复杂的解析器通常都使用这些内置解析器对象创建。
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