length of run,runtime,running time,machine hour是什么意思

用法例句

The established way and the effect factor as well as the increased mathods ofcontinuous operating time for a system are introduced in this paper.

对系统连续运转时间的确定方法、影响因素与提高的方法的介绍，有利于提高系统的运转状态，合理确定备用设备的数量和维修周期，提高系统的可靠性，增加生产率，最大限度地提高经济效益。