（二）在铁路、城市轨道交通线路上放置障碍物，或者故意向列车投掷物品的；
问题是，当 AI 接手这些基础执行工作，短期内利润率确实好看，但代价是新人少了练手的机会，等到五到十年后，市场极度缺乏能够审查 AI 复杂输出、承担最终决策责任的高级人才时，这个代价就会以一种所有人都措手不及的方式显现出来。
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The opportunity in AI Optimization exists because most content creators haven't recognized its importance yet. Traditional SEO remains the primary focus, while this emerging traffic channel grows rapidly with relatively light competition. This window won't stay open indefinitely. As more people understand AIO's value, competition will intensify and optimization will become more sophisticated.
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数百名民众不顾坠机后可能发生的火灾和爆炸风险，冲破安全警戒线哄抢钞票，社交媒体疯传的视频显示，人们争相捡拾一捆捆现金，甚至有人钻进燃烧的飞机残骸中搜寻钱财。
the Open Source sustainability crisis.。同城约会对此有专业解读