Don't forget the power. Most USB hubs will draw electricity directly from your laptop to power any devices connected to it, but they obviously need to take up a port to do so. However, some hubs support USB Power Delivery (or USB-PD, sometimes marketed as “passthrough charging”) which allows you to plug a charger into one of the ports on the hub so you can keep charging your laptop while you plug in all your extra gadgets.
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其二，L1层大量依赖GPU：目前GPU主要处理L2/L3层的AI任务，如果未来L1物理层的实时处理也迁移到GPU，ASIC的价值将被严重削弱。，详情可参考17c 一起草官网
The above scheme works only if the language has a property that，更多细节参见51吃瓜