To help answer this question, you must actively collect and maintain a baseline: extensive information about the state of the system at a time when that system is operating normally.

要帮助回答这个问题，您必须主动地收集并且维护一个基准：有关系统正常运行时的状态的广泛信息。

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The level of description was highly uneven, with some areas having extensive and detailed descriptions (for instance, state machines), while others had little or no explanation.

它所描述的层次有些地方具有某些广泛的和详细的描述(例如，状态机)，但是非常不平均，而其它的一些地方几乎没有解释。

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Second, a lot of the older inmates had extensive health problems that cost the state a lot of money.

第二，很多年纪较大的服刑者有众多的健康问题，耗费了州里很多资金。

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This fails to recognize the oil and gas production already was subject to extensive federal and state air quality regulations before the new rules.

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This is especially important insofar as the U.S. government has been seeking ways in which to encourage our allies to cut back their counterpart programs, which are enabling vast enterprises like Total, ENI, Elf, Statoil and Siemens to do extensive business with state-sponsors of terror.

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Discounting is already extensive, given the state of the economy.

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