Qidian library
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There's a Euclid Living in the Monitor
There is a Euclid living in the monitor. He spent his whole life measuring the world and proving plane geometry, but before he died, he discovered that the sum of the interior angles of all triangles was a little more than 180 degrees. Is it a measurement error, or is the universe itself bending? Since then, Gauss, Riemann, Hubble, and Penrose have successively embarked on the path of seeking truth. They witnessed the expansion of space, the rise and fall of civilizations, and even found evidenc
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Black Bear Picture Sister-In-Law: a Hundred Years of Loneliness on the Beach
There are traces of the passage of history here, as well as the marks left by the progress of the times. Beginning with a letter from home on the wharf of the Republic of China, Niu Fuqing and Zhao Huaxiong forged old friendships in troubled times; the mountains and rivers of their homeland and the war were displaced, and when it fell on ordinary people, it became a sigh in marriage, origin, household registration, house and dinner table. The generations of Niu Aiguo, Zhao Gouxiong, and Da Nai
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