crack initiation life

例句：

1. 1.The crack initiation life of the material is an important factor in its durability.
   材料的裂纹起始寿命是其耐久性的一个重要因素。
2. 2.The new design has a longer crack initiation life compared to the previous one.
   新设计与之前的相比具有更长的裂纹起始寿命。
3. 3. The research focused on improving the crack initiation life of the material under high temperature conditions.
   该研究专注于提高材料在高温条件下的裂纹起始寿命。