Backup is a critical change control function.

备份是一项关键的更改控制功能。

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To do an online table space and database level backup using the Control Center, follow these steps.

要使用Control Center来执行联机表空间级和数据库级备份，请执行这些步骤。

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Lost of a control file with no backup.

没有备份的控制文件的丢失。

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General Atomics, the manufacturer of the Predator and the Reaper, argues that its later models have more backup systems to prevent those momentary losses of control.

FORBES: Magazine Article

The microgrid comprises eight 100-kW grid-tied inverters, the rooftop PV array, the lead-acid battery pack, backup diesel generators, and a Web-based monitoring and control system.

FORBES: Solar-Powered Microgrid Slashes Alcatraz Island's Dependence On Fossil Fuels

New Orleans' levee and water control systems have been steadily improved by upgrading pumps with backup generators.

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