它提供了一个基于数天内的平均失效时间信息和数小时内的失效恢复信息的可用性特性。
This provides an availability figure based on mean time to failure information in days, and mean time to recover information in hours.
如果知道失效之间的平均时间和平均恢复时间(例如对于硬件)，则使用这一部分中的计算方法。
If you know the mean time between failures and the mean time to recovery, e.g. for the hardware, use the calculations in this section.
平均失效到达时间是连续运行期间的平均值——也就是说，在结束一个失效和开始另外一个之间的平均周期。
Mean time to failure is the average continuously operational period — i.e. the average period between the end of one failure and the beginning of the next.
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