发囊，干细胞位于膨胀部位 • 慢周期性(slow cycling)：如小鼠表皮干细胞 的标记滞留可长达2 年; • 干细胞的自我更新能力：表现为在离体培养时 细胞呈克隆性生长,如连续传代培养,细胞...
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结果观察到与其不同阶段相对应的脑电图特征，典型表现为周期性尖慢复合波。
Results Different EEG features in correspond with various stages of the diseases were observed periodic sharp wave complexes as the typical pattern.
光子晶体是一种具有周期性介电结构的人造材料，具有独特的光子带隙特性，能控制光子的运动状态，是慢光实现的最佳材料系统之一。
The physical mechanism of slow light in photonic crystals, a novel and artificial material with periodic dielectric structures, is described with a few different approaches.
慢波系统一般采用周期性结构，其中传输的电磁波需要满足十分复杂的边界条件。
Slow-wave systems generally employ periodic structures, and the electromagnetic waves transmitted therein are required to satisfy very complicated boundary conditions.
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