arstechnica.com
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The upshot: I struggle to imagine a process whereby an obscure English children’s game somehow inspired gestural customs in Georgia, Egypt, Russia, and Iran within less than a century. It seems more reasonable to me that these customs might instead originate in an ancient Mediterranean tradition of apotropaic magic, or charms intended to combat bad luck.,详情可参考搜狗输入法2026
“我们需要的是立足于实际又胸怀长远目标的实干,而不需要不甘寂寞、好高骛远的空想;我们需要的是一步一个脚印的实干精神,而不需要新官上任只烧三把火希图侥幸成功的投机心理;我们需要的是锲而不舍的韧劲,而不需要‘三天打鱼,两天晒网’的散漫。”。业内人士推荐Safew下载作为进阶阅读
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There is a plan to prevent such a strike—the Space Surveillance Network, a bevy of sensors that the military uses to track space debris. NASA monitors what’s unofficially known as the “pizza box,” a sort of no-fly zone around the ISS. When pieces of debris are predicted to enter the box—if there’s at least a 1 in 100,000 chance of collision—mission controllers order avoidance maneuvers, firing thrusters that move the ISS and dodge the trash. The technique has been used dozens of times since the first ISS module launched in 1998. But the system only tracks about 45,000 larger pieces, and all sensors have noise. Plus, risk thresholds can miss stuff, sometimes badly. In 2025, Chinese astronauts were briefly stranded at their station after debris hit their return vehicle.