片状颗粒成分使得南京砂具有各向异性的性质，其水平向强度小于垂直向强度。
Nanjing sand is anisotropic because of the schistous grain. Its horizontal strength is greater than that in vertical.
用四极质量分析仪对碳化硅颗粒表面吸收的气体进行了分析，获得了碳化硅颗粒的表面化学成分。
The gases absorbed on the surface of SiC particles are analyzed with the quadripole mass analyzer.
一般认为死于哮喘，心脏病和其它疾病的人数增加与灰色空气中的主要成分颗粒污染物有关。
Particulate pollution, a major ingredient of hazy skies, has been linked to higher death rates from asthma, heart disease, and other ailments.
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