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给系统上电，观察机器能否启动。
turn on the system and see if the machine will power up.
Last Update: 2007-01-12
Usage Frequency: 3
Quality:
重大活动期间安全措施国际常设观察机构
international permanent observatory on security measures during major events
Last Update: 2016-12-04
Usage Frequency: 12
Quality:
