（图源：长春高新 2021 年年度报告）
print(f"Saved: {item}")
。业内人士推荐爱思助手下载最新版本作为进阶阅读
第五十四条 违反本法规定，未经批准，擅自从事核燃料生产经营活动的，由国务院核工业主管部门责令停止生产经营活动，没收核燃料及违法所得，处违法生产经营的核燃料市场价值二倍以上十倍以下的罚款；对负有责任的领导人员和直接责任人员处十万元以上五十万元以下的罚款，并依法给予处分。
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.