The natives pounded the grain into a fine powder.
当地人把谷类碾成细粉。
Armstrong began to describe what he saw: "The surface appears to be very, very fine grain, like a powder. I can kick it loosely with my toes."
阿姆斯特朗开始描述他所看到的：“月球表面呈现的是非常非常细的微粒，像粉末，我可以用脚趾踢松它。”
White fused alumina products including section sand, grain-size sand; fine powder and micro powder are widely used in refractories, abrasives and other industries.
白刚玉段砂、粒度砂、细粉、微粉在耐火材料、磨料磨具等不同行业具有广泛的用途。
Three basic ways to restrain the abnormal grain growth were suggested such as pretreatment of the starting fine powder, improving the sintering agents and adding other hard material powders.
举例说明了对原料金刚石微粉进行前处理，选择合适的烧结助剂，以及在原料金刚石微粉中添加少量其它物质，是抑制金刚石异常粒成长的三种基本方法。
The preparation method adopts the following steps: hexacyclic stone is crushed and ground into ultra fine powder body with the grain size larger than 1000 meshes;
其制备步骤包括将六环石破碎、粉碎、研磨成超细粉体，使其粒度大于1000目；
The preparation method adopts the following steps: hexacyclic stone is crushed and ground into ultra fine powder body with the grain size larger than 1000 meshes;
其制备步骤包括将六环石破碎、粉碎、研磨成超细粉体，使其粒度大于1000目；
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