实物货币是庞大的、带着细菌污渍、耗碳量巨大并且价格昂贵的交换介质，让我们抛开它吧。
Physical currency is a bulky, germ-smeared, carbon-intensive, expensive medium of exchange. Let's dump it.
该机加热器部分采用三层套管结构：热交换介质在 1 和 3 中流动，物料在 2 中反向流动。
This machine heater part adopts three layer casing structure: heat exchange medium flow in 1 and 3, material flow in 2.
识别、指定和解决常见交换网络的介质问题、配置问题、自动协商和交换硬件故障。
Identify, prescribe, and resolve common switched network media issues, configuration issues, auto negotiation, and switch hardware failures.
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