高镁矿物粉尘溶解速率在第一阶段多出现峰值；
Most of the dissolving rates of high_magnesium mineral dusts display peaks in the first dissolving stage.
它的主要组成成分是硫酸盐、硝酸盐、氨、氯化钠、碳、矿物粉尘和水。
The major components of PM are sulfate, nitrates, ammonia, sodium chloride, carbon, mineral dust and water.
超细矿物粉尘和纳米级永久悬浮粉尘是目前粉尘环境安全性评价的重大课题。
At present, the superfine mineral dust and nanometer suspending dust are the important components of dust environment safety assessment.
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