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A 12-year-old in Colorado built a lead detector out of carbon nanotubes after watching the Flint water crisis unfold, and her sensor can test water in seconds instead of sending a sample to a lab and waiting days for the result
这是一条来自 Reddit 的热门内容：A 12-year-old in Colorado built a lead detector out of carbon nanotubes after watching the Flint water crisis unfold, and her sensor can test water in seconds instead of sending a sample to a lab and waiting days for the result。原文链接可查看完整细节与讨论。
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