focus field size
焦场大小
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Because of its small size, nanometer materials have special physical, chemical and structure characteristics. Nanometer materials have become the focus of material researching field today.
纳米材料由于其小尺寸而具有特殊的物理化学和结构特征使之成为当今材料领域研究的热点。
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