Shut the database down and back up all data and all log and control files.

关闭数据库，备份所有数据以及所有日志和控制文件。

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Control light. Adjust light levels up or down.

操控光亮：使周围的亮度变亮或变暗。

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Scissor - style system control the up and down of the platform, performance is stable.

剪式系统控制平台的起落，性能稳定耐用。

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Scissor - style system control the up and down of the platform, performance is stable.

剪式系统控制平台的起落，性能稳定耐用。

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