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materials with acoustic gradad index
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materials with acoustic gradad index
Encyclopedia
理学
声学超常材料
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materials with acoustic gradad index
声梯度折射率材料
一种非均质的复合材料,它的组分和结构在材料内部按一定规律连续变化,从而使折射率也相应地呈连续变化。
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Polish Uprising of 1863
polisteskinin
polite language
politeness
politeness theory
political absorption
political advertising
political agenda
political and legal ideas
political and legal system
political anthropology
political appointment official
political arithmetic
political attitudes
political behaviour
political beliefs
political blog
political body
political cartoons
political change
political civilization
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political cognition
political commentary
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