英语语法分析

The presented method can be easily used in engineering for MTTF evaluation of large complex system, where limited testing data of unit life time is required.

解决了有限样本条件下，大型复杂系统平均寿命评定问题，对工程中大型复杂系统平均寿命评定具有重要应用价值。

The common reliability targets are reliability probability and m 'ttf (Mean Time To Failures). MTTF features directly and distinctly, so it is more convenient.

工程中常用的可靠性指标有可靠度和平均寿命，平均寿命指标直观、物理概念清晰，使用更加方便。

The reliability lab ship fuel oil donkey boiler controlled by relay control system is evaluated using counting method, and mean time to failure (MTTF) of the control circuit is educed.

对采用继电器控制系统进行控制的某实验室船舶燃油辅助锅炉，采用计数法进行可靠性评估，得出控制电路的平均无故障时间。