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史上最大胆的能源计划：从黑洞中提取能源？
source link: https://tech.sina.com.cn/d/s/2018-08-15/doc-ihhtfwqr4087742.shtml
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来源：环球科学ScientificAmerican有朝一日，太空电梯能够将物质运送到地球以外。但是，我们能在黑洞附近建造一架足够结实的电梯吗？总有一天太阳会陨落，供其进行核聚变的燃料会耗尽，世界会变得阴冷。如果届时地球仍然健在，人类将会坠入
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