Routers operate at the network layer in the network model, one step above Ethernet.
路由器在整个网络模型的网络层运行，比以太网高了一级。
Technically, network switches operate at layer two (Data Link Layer) of the OSI model.
从技术上讲，网络交换机工作在OSI模型的第二层（数据链路层）。
The model is intended to operate in a combat environment.
这个模型是置于战场环境之下的。
The experiment shows that the model definition framework is effective, universal and easy to operate.
实验结果验证了地理模型定义文档框架的有效性、通用性、易操作性。
The experiment shows that the model definition framework is effective, universal and easy to operate.
实验结果验证了地理模型定义文档框架的有效性、通用性、易操作性。
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