如果这不是给定环境的理想选择，您可以在定期维护时间段内显式使用DB 2runstats或reorgchk命令。
If this is not the desired option in a given environment, you can instead use DB2 runstats or reorgchk commands explicitly in a scheduled maintenance window.
况且，要它长时间的保持白色外观本身就会产生一些问题，因为在这块房屋外露的部分进行油漆粉刷是很难进行定期的维护保养的。
Maintaining a white finish over a length of time would present its own problems as a paint finish on such an exposed part of the house could require regular maintenance with difficult access.
美国的煤电厂平均一年有12.5%的时间用来做定期或不定期的维护。
The average U.S. coal plant is offline 12.5 percent of the year for scheduled and unscheduled maintenance.
对于控制回路，如果没有定期的维护，控制系统的性能会随着时间推移而退化。
The performance of control system will degenerate with elapsed time to a control loop if there is no periodic maintenance.
我们正在对我们的网站定期维护星期六，12月18日下午11：59开始，12：30结束上午在亚利桑那州的时间。
We are performing scheduled maintenance on our website Saturday, December 18th starting at 11:59 PM and ending at 12:30 am Arizona Time.
预防性设备维护是按周期、约定时间间隔对设备定期进行维护，是设备维护管理常用的手段之一。
Preventive equipment maintenance is to maintain equipment periodically according to a period and a conventional time interval and is a normal measure for equipment maintenance and management.
每年会在一段时间的公开审阅之后对该框架加以扩充，并且还会通过确定和修正错误，定期对其加以维护。
It is expanded annually, after a period of public review, and maintained regularly through the identification and correction of errata.
每年会在一段时间的公开审阅之后对该框架加以扩充，并且还会通过确定和修正错误，定期对其加以维护。
It is expanded annually, after a period of public review, and maintained regularly through the identification and correction of errata.
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