在“服务员忙期”内的失效次数；

The failure number during the "server busy period";

youdao

不需要。你可以在任何你完成CFA项目所需要的时间内报考(各等级)，你(已通过等级)的考试成绩都不会失效，而且我们不限定你每个等级的报考次数。

No, you may take as long as you need to complete the CFA program; your exam results never expire; and we don't limit the number of times you can sit for each exam level.

youdao

运用本文模型可以直接计算指定载荷作用次数下，存在共因失效时的多状态系统可靠度。

When the times of load are designated and a common cause failure exists, the reliability of a multi-state system can be calculated directly by means of the model proposed.

youdao