主要内容包括以太网帧的结构和交换机的工作原理的翻译：Main content includes Ethernet frames and switch work principle 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

The main contents include Ethernet frame structure and the switch works

Main content includes Ethernet frames and switch work principle

Primary coverage including ethernet frame structure and switchboard principle of work

Key elements include Ethernet frame structure of the work on the principle and switches

Main content includes Ethernet frames and switch work principle