etch pits

• 腐蚀坑

etch pits的用法和样例：

例句

1. The corrosion pits on the blade surface contributed to such failure as an additive factor.
   叶片表面的腐蚀坑是其疲劳断裂的另一促进因素。
2. The damage of sub-surface was very similar to the damage of the surface, mainly with a few oxidation eroding pits.
   次表层上主要分布着少量细小的氧化腐蚀坑，次表层和表层的失效非常吻合。