演示: demonstrate; show-how; repro ...活动: move about; exercise安全: safe; secure; safety; securi ...策略: tactics a surname的: 4次方是 The fourth power of 2 i ...安装: install; erect; fix; mount; ...与: take part in; participate in操作: operate; manipulate; handle安全策略: safe strategy; safety strategy; security policy; security strategy安全策略表示: security policy expression安全策略级别: security policy levels电子政务安全策略: electronic government security policy电梯的安装与修理: construction information高炉的安装与修理: furnace installation and repair视频和电视设备及系统维护与操作的安全要求: safe handling and operation of audiovisual video and television equipment and systems安装的安全性: installation security电器设备的安装与修理: electric appliance installation and repair空调设备的安装与修理: air conditioning apparatus installation and repair操作策略的力点: point on strategies水上活动安全第一: being safe around water城市交通安全管理指南-城区道路安全策略: urban safety management guidelines- road safety strategies for urban communities策略的: resourceful; tactical与操作: and operation舰队反恐怖活动安全小组: fleet anti-terrorism security team （fast）潜水活动安全注意事项: skin diving safety rules
