市民小心翼翼地走在冰面上，冰面上坑坑洼洼净是冰碴儿。
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Can robots ever be graceful?
我們需要對AI機器人保持禮貌嗎？
The US military mistakenly shot down a Customs and Border Protection (CBP) drone near the Mexican border in a strike that reportedly used a laser-based anti-drone system. The CBP uses drones to track people crossing the border.