What you need is scheduled maintenance.
定期“保养”是你所需要的。
System under scheduled maintenance, please come back later.
系统定期维护中，稍后再回来。
Perform scheduled maintenance service on oil and solid fuel heating systems.
对油和固体燃料加热系统进行定期维护服务。
We're sorry. The Web site is temporarily unavailable due to scheduled maintenance.
我们感到非常抱歉，网站临时无效，计划维护。
First he stops the production in the cloud while pretending to be on scheduled maintenance.
他首先会假装由于要执行预定维护而停止云中的生产环境。
The average U.S. coal plant is offline 12.5 percent of the year for scheduled and unscheduled maintenance.
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。
Arrange the daily work of the maintenance team, implement the scheduled or non-scheduled maintenance work.
安排维修团队的日常工作，实施计划的或非计划的维修。
The next maintenance release of JRuby is scheduled for release later this month.
按照计划这个月底将要发布JRuby的下一个维护性版本。
We are performing scheduled site maintenance at this time.
目前我们正在进行排定的网站维护。
We are performing scheduled site maintenance at this time. Please check back with us later.
目前我们正在进行定期网站维护。
We are performing scheduled site maintenance at this time. Please check back with us later.
目前我们正在进行定期网站维护。
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