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So far, in children the most common causes of hair loss is scalp fungal infection sites, that is what we call ringworm.

目前为止，引起儿童脱发最常见的原因是头皮部位的真菌感染，即我们所说的癣。

In this paper,based on the analysis of basic features of ground fissures in Xi an ,the numerical simulation of ground fissures in Xi an is made by using two dimensional finite element method.

本文在分析总结西安地裂缝基本特征的基础上，采用二维有限元法，对西安地裂缝进行了数值模拟。