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The material preparation above is necessary, but it is not enough.
上面的材料准备是必要的，但它是不够的。
youdao
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The invention belongs to the fields of surface technology and material preparation.
该发明属于表面技术、材料制备领域。
youdao
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The invention belongs to the fields of surface technology and material preparation.
该发明属于表面技术、材料制备领域。
youdao