名词
中文翻译：多晶体
同义词：
['polycrystal', 'polycrystalline']
例句：
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1. The crystals are sosmall that they can be seen only witha microscope.
这些晶体太小了，只能用显微镜才能看到。
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2. Polycrystallinematerials are often used in electronics dueto their high strength and low density.
由于其高强度和低密度，多晶体材料常用于电子领域。
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3. The polycrystalline structure of the material allowsfor better heat conduction and dissipation.
这种材料的多晶体结构使得更好的热传导和散热成为可能。