The key problem in information extraction is how to generate accurate, general, and robust extraction rules.

信息抽取中的关键问题是如何编写健壮、准确和通用的抽取规则。

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Rather than relying on automatically recorded hidden field data, extraction rules can be manually added and customized as needed.

提取规则可以根据需要手动添加和自定义，而不是依赖于自动记录的隐藏字段数据。

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With standard XSLT, we can exploit strong and flexible features of the language to construct simple, robust and general extraction rules.

基于标准的XSLT，可以利用它强大而且灵活的特性编写简单、健壮和通用的抽取规则。

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But oil and gas is a huge chunk of the extraction business, and the percentage depletion rules are more favorable for fossil fuels than for other things you might extract.

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Job-creating companies, aware that regulation is inevitable and, if done right, can lend credibility to their natural gas extraction, are working with many officials to craft disclosure and other rules.

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