1. That oval shape prevents light from converging on the retina. 这种椭圆形防止光线在视网膜上的趋同。
2. Judge: You mentioned in your first speech the importance of variety even though the east and west are converging. 评委：在你的第一个演讲中你提到，尽管东、西方文化存在共，多样仍有其重要。
3. The new algorithm has good converging speed and local searching ability of local optimal methods, as well as the global converging character of IA. 新的算法既具有局部搜索方法较快的收敛速度和较强的局部寻优能力，又具有免疫算法的全局收敛特性。
