Dimples diffuse annularly on the surface of water. The shadows of leaves and flowers with the lipper undulate, ring upon ring.
涟漪在平静的水面上一圈圈扩散开去，投在水面上荷花和荷叶的影子这时此起彼伏，层层叠叠。
In the well-differentiated astrocytoma showed structure of ring upon ring, the inner ring was the basement membrane of blood vessel, while the outer ring was the glial membrane.
分化较好的星形细胞瘤中可以见到内环是血管基膜、外环是胶质膜的双环结构。
In this paper, from information security requirement analysis, constructing information security model is put forward through ring upon ring decomposing and progressively thinning method.
文章通过对信息安全的需求分析，提出了对信息安全需求用层层分解、逐步细化的方法来构造信息安全模型。
In this paper, from information security requirement analysis, constructing information security model is put forward through ring upon ring decomposing and progressively thinning method.
文章通过对信息安全的需求分析，提出了对信息安全需求用层层分解、逐步细化的方法来构造信息安全模型。
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