Силовые структуры
Scientists warn that as humans move more activities off-Earth, more debris will fall to Earth, polluting as it plummets.
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用手动车床制作擀面杖的老手艺人
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.