The results demonstrated that the pharyngeal wall consists of the three layers of structure including outer, middle and inner layer.
咽壁的中层分为内侧发达的环肌和外侧较薄的纵肌两部分；
The UCLA scientists start with a field of tiny nanowires. Then they deposited layers of nano-sized lithium aluminosilicate to those nanowires, creating a three-dimensional structure.
加州大学洛杉矶分校的科学家先找来很细的纳米线，之后在那些纳米线的表面沉积了一层纳米锂铝硅，制造出一种三维结构。
The general network-version software adopt two layers of structure, the thesis have adopt three layers of structure to realize the system frame.
一般的网络版软件采用二层结构，本文采用了客户端、中间件、服务端的三层结构来架构系统。
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