如果一件单品在潮湿的气候下填充而在干燥的气候中测试，填充物原料的重量会下降。
If a piece if filling in a humid climate and tested in a dry climate, the weight of the filling material can be lower.
但是麦克亚当发现只要土壤干燥，压结实后自身就能承受公路的重量。
Mcadam found that soil itself could bear the weight of the road when it was compacted as long as it was dry.
用干燥岩心样品重量除以颗粒体积得到岩心样品的颗粒密度。
The grain density of core samples is calculated from the measured dry weight divided by the grain volume.
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