该模型可用于含初始缺陷或意外损伤的螺旋桨叶无限寿命可靠性分析和设计，得到桨叶可靠度与初始裂纹尺寸之间的函数关系式。

The model is applicable to the reliability analysis and design of infinite life for propeller blades or other structural members with initial defects and accident damage.

youdao

And the challenge is to combine "the permission to be human" to experience the emotion to go through the motion and yet not to enter the downward spiral where six months later, after small incident, I'm still in that rot.

困难在于将之与准许为人相结合“,去体会情绪，实现转移,但不会进入下行螺旋，在发生小小意外六个月后，仍心情低落。

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