The research of synthesis and properties of superhard materials has been a focus of solid physics and material science.
超硬材料的合成及其性质的研究，一直是凝聚态物理和材料科学研究的重点之一。
Since pure radioactive ion beam can be implanted into material directly, research on solid physics especially on impurity and defect in semiconductor become possible.
由于可以将纯净放射性核束注入到样品中去，使得其在固态物理特别是涉及到半导体中的杂质和缺陷问题的应用成为可能。
According to the theory of solid physics from metal micro - structure and compression strength of tin-coating grain, a study is carried out in this essay on mechanism of parts stained with black dust.
根据固体物理中金属的微观结构、镀锡晶粒的抗压强度理论，分析了黑色粉末产生的机理。
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