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big-bang nucleosynthesis
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big-bang nucleosynthesis
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理学
宇宙的热历史
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big-bang nucleosynthesis
大爆炸核合成
大爆炸后宇宙膨胀温度降到约10亿度时由质子和中子经聚合反应生成氘、氦、锂等轻元素核的过程。
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Strategy of Invigorating China through the Development of Science and Education
strategy of nuclear deterrence
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strategy of the development of the Guangdong-Hong Kong-Macao greater bay area
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strategy to encourage the development of the eastern region
strategy to promote the rise of the central region in China
strategy to revitalize the northeast area and other old industrial bases
stratifiability
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stratification
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stratification of a manifold
stratification of a space
stratification of military organization
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