c. A router needs to decapsulate and encapsulate the frame and change physical的翻译：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

翻译结果1 翻译结果2 翻译结果3 翻译结果4 翻译结果5

C.一个路由器需要拆封和封装的帧，并改变其物理

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