名词
中文翻译：Unknown
同义词：
['average particle size', 'average size']
例句：
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1.The engineer calculated the mean particle size of the sand.
工程师计算了沙子的平均粒径。
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2.The company's policy on environmental standards is to ensure that its mean particle size does not exceed the legal limit.
该公司的环境标准政策是确保其平均粒径不超过法定限制。
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3. The researcher found that the mean particle size of the soil was significantly smaller than expected.
研究者发现土壤的平均粒径比预期小得多。