ConclusionThe superficial cells of limbus and cornea are of mature status, while limbal basal cells show some undifferentiated feature, which indicates the location of stem cells.
结论角膜及角膜缘表层上皮较为成熟分化，而角膜缘基底细胞具有未分化细胞的特征，很可能是干细胞的部位。
In chapter 2, this paper explores the structure and feature of analogy, pointing out that, as a method of inference, it has a deep structure and feature not a superficial similarity.
第二部分探讨了类比的结构及特征，指出了类比作为一种推理方法，它有着深层的结构，而不仅仅是表面上的类似。
Methods The manifestation, internal echo, the L/T ratio, CDFI and RI frequency spectrum feature of the superficial lymph nodes were studied with high frequency and color Doppler ultrasound 89 cases.
方法本组89例，应用高频率的彩色多谱勒超声检查肿大淋巴结的形态及内部回声、纵横比（L/T）、彩色多谱勒血流显像（CD FI）及阻力指数（RI）的频谱特征。
应用推荐