operating and maintaining中文什么意思

例句与用法

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1. Our model is easy to operate and maintain .
   我们这个型号（的机器）很容易操作和保养。
2. Protocols that must be followed exist for operating and maintaining airplanes
   原则必须依循现有状况来操作维护飞机。
3. Dwr operates and maintains the state water project , including the california aqueduct
   描述:水资源部门执行并监督国家的水工程，包括加利福尼亚沟渠。
4. The machine , with pleasing appearance and stable accuracy , can be operated and maintained conveniently
   机床外形美观大方，精度稳定可靠，操作维修方便。
5. Echl operates and maintains the system round the clock and provides a help desk for subscribers
   Echl负责二十四小时操作和管理该系统，并提供用户求助台服务。