The fractal theory provides an important method in study of irregular objects of self-similarity and self-affinity.
前言： 分形理论是分析和研究自然界中具有“自相似性”、“自仿射性”不规则形体的重要手段。
2
The main influences that sports have on university student's psychological health are competitiveness, self-exploration, public influence and affinity influence etc.
体育对大学生心理健康的影响主要有：竞争性影响、自我开发性影响、公开性影响、亲和性影响等。
3
The affinity of self-incompatibility in the mustard family affects the purity of hybrid seed and the propagation coefficient of stock plant.