名词
中文翻译：多晶的
同义词：
['polycrystal', 'polycrystalline', 'polycrystalline structure']
例句：
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1. The crystals are so small that they can be seen only with a microscope.
这些晶体太小了，只能用显微镜才能看到。
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2.The polycrystalline structure of the material is responsible for its strength and durability.
这种材料的多晶体结构是其强度和耐用性的原因。
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3.The polycrystalline structure of the metal allows it to conduct electricity efficiently.
金属的多晶体结构使其能够有效地传导电流。