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刚体地球章动
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刚体地球章动
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刚体地球章动
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rigid Earth nutation
刚体地球章动
假设地球为刚体时,瞬时地球自转轴总是缓慢绕平均地球自转轴旋转,形成进动或岁差轨迹,又因受到外部天体引力矩作用,瞬时地球自转轴围绕平衡位置(岁差轨迹)作微小摆动。
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social dominance orientation
social drama
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social economic map
social-economic-natural complex ecosystem
social economic relations
Social Economic System
social ecosystem stability framework
social education
social educational institute
social education department of museum
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social elites
Social Emergency Command Control System
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Social Emergency Management System
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social emotion
Social Endowment Insurance for Urban and Rural residents
social engagement theory
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social engineering attack
Social Entrepreneurship
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