The reference model defines seven layers of functions that take place at each end of a communication.

参考模型定义了7层的职能发生在每个月底的沟通。

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Table 1 and Figure 1 show seven layers developed by the author; they are shown as a reversed sequence diagram.

表1和图1显示了由本文作者开发的七个层，它们按照逆序列关系图进行显示。

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Eight layer structure for the brick structure, floors, underground, seven layers on the ground, the height: 2.8 meters.

建筑结构为砖混结构，楼层八层，地下一层，地上七层，层高：2.8米。

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Comprising of seven tiny layers, each 50 to 100 nanometers in height, the coating is made of silicon dioxide and titanium dioxide nanorods positioned at an oblique angle.

CNN: New nano coating boosts solar efficiency