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Encyclopedia
理学
气体辐射化学
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屏蔽体
根据射线通过物质时被减弱的原理,将外照射剂量减少到剂量限值以下而专门设计、建造的保护性物体或装置。又称屏蔽物。
理学
地盾
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shield
地盾
克拉通中有前寒武纪结晶基底和高级变质岩大面积出露、周缘被有盖层的地台所环绕、平面形态呈盾状的地区。
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singular ordinal
singular ordinal number
singular parabolic equation
singular part
singular pencil
singular pencil of matrices
singular periodic solution
singular perspectivity
singular perturbation
singular perturbation method
singular perturbation problem
singular perturbation system
singular perturbed system
singular plane
singular plane of support
singular point
singular point at infinity
singular point of a curve
singular point of a difference equation
singular point of a differential equation
singular point of a quadric
singular point of a surface
singular point of higher order
singular point of order k
singular probability distribution
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