By analyzing the influence of hemisphere pits with different dimension and ellipsoid pits with different aspect ratio on stress and strain distribution of lap joint , the possible propagation of fatigue crack was discussed , and the effects of localized pitting corrosion on the structural integrity of lap joints were discussed 通过分析不同尺寸的半球形蚀坑和不同长短半轴比值的半椭球形蚀孔应力应变分布的影响，探讨搭接件疲劳裂纹的可能扩展方向，讨论局部孔蚀对搭接件结构完整性的影响。
The results under scanning electron microscope were that the compound eye of miers is semi - globular . the surface area of the compound eyes is about 25 . 12mm2 . the ommatidia that form the compound eye are hexagon . on the back of the compound eye there is a thumb - shaped area where have no ommatidia 扫描电镜观察显示三疣梭子蟹的复眼外形为半球形，复眼表面积约为25 . 12mm ~ 2 ，背面有一拇指状的无眼区，组成复眼的小眼为长六边形；刀额新对虾的复眼外形为球形，背面无拇指状的无眼区，组成复眼的小眼为四边形。
