（二）具有网络虚拟定位功能的；
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And you won't need to top up manually in the hard to reach corners, this vacuum has edge-to-edge cleaning that makes sure you get a better coverage along walls and corners. It also comes with an OMNI docking Station. Here the vacuum does all its maintenance, including mop washing and drying, water refilling, and dust emptying for up to 150 days. So there's really next to no work for you to do.，这一点在夫子中也有详细论述
await writer.write(enc.encode("Hello, World!"));