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gravitational time delay
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gravitational time delay
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gravitational time delay
引力时延
光在引力场中传播的时间比没有引力场存在时相同两点间传播的时间要长的一种广义相对论效应。又称夏皮罗时延。
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ecological disaster
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ecological disasters for Fisheries
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ecological diversity of water ecosystem
ecological dredging
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Ecological Engineering for the Rural Household Economy
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