The motor on the spot is in operation in the random failure period and therefore its failure rate is approximately a constant.

现场使用的电机基本运行在偶然失效阶段，因而其失效率近似为一常数。

youdao

Their early success was succeeded by a period of miserable failure.

他们起初获得成功，但随后有一段惨痛失败的时期。

《牛津词典》

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.

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。

youdao

There's sort of a period around the age of four, four and a half, where kids make the transition from failure to success.

儿童在大约四岁四岁半时,会发生从失败向成功的转变

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The failure to respond within this period will result in suspension of your CPA license.

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