subcritical crack growth

例句：

1. 1. The subcritical crack growth rate is a critical factor in the fatigue life of materials.
   亚临界裂纹扩展速率是材料疲劳寿命的关键因素。
2. 2. The study of subcritical crack growth has significant implications for engineering applications.
   亚临界裂纹扩展的研究对工程应用具有重要意义。
3. 3. In the process of material manufacturing, it is important to monitor and control subcritical crack growth to prevent failure.
   在材料制造过程中，监测和控制亚临界裂纹扩展以防止失败非常重要。