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- Method of Measuring Concentration of Dust In the Air on the Principle of Scattered light. 空气中粉尘浓度的光散射式测定法。
- Stationary source emissions - Determination of low range mass concentration of dust - Part 1: manual gravimetric method. 固定源辐射。粉尘的小范围质量浓度的测定。第1部分:人工重量测定法。
- Here, a high concentration of dust and molecular gas absorb practically all the visible light emitted from background stars. 在这个分子云中，高密度的尘埃和分子云气几乎完全挡住了背景恒星所发出的可见光。
- The motor car disappeared in eddy of dust. 汽车在一片扬尘的涡流中不见了。
- The chemical analysis results show that except Zn, Cu and Ba the concentration of all other heavy metals is highest of dust samples in the northern segment. 样品重金属含量分析结果显示，除了Zn、Cu和Ba以外，其它重金属的含量北段均高于其它各段。
- There is a fine layer of dust on the desk. 桌子上有一层薄薄的尘土。
- Methods Peripheral blood amount of EOS, serum concentration of ECP and IgE were detected in 43 asthma patients and 25 controls by IMMULITE and Behring Nephelometes 100. All of the children received the skin test of dust mite extract during interview. 方法 分别采用美国IMMULITE化学发光仪和德国BN10 0特种蛋白仪检测 4 3例支气管哮喘患儿和 2 5例正常对照血清ECP、IgE浓度及外周血EOS数值 ,并与尘螨皮试的变化相比较。
- The car went past in an eddy of dust. 那汽车在一阵滚滚的尘土中驰过。
- A fine layer of dust covers everything. 所有的东西都盖了一层薄薄的灰尘。
- Weighing filtration membrane is often used to get the dust concentration of environment.However,this method is discommodious and can not get the instantaneous transformation of dust concentration. 环境粉尘浓度的测定一般使用滤膜称重方法测得,该方法费时费力,且不能得到瞬时粉尘浓度的变化。
- The mirror is covered with a film of dust. 镜子蒙上了一层灰尘。
- I've got a speck of dust in my eye. 我眼睛里弄进了一粒灰尘。
- Weighing filtration membrane is often used to get the dust concentration of environment.However, this method is discommodious and can not get the instantaneous transformation of dust concentration. 摘要环境粉尘浓度的测定一般使用滤膜称重方法测得，该方法费时费力，且不能得到瞬时粉尘浓度的变化。
- Eddies of dust swirled in the road. 路上尘埃滚滚。
- Objective] Working in the environment with high concentration of dust for a long time everyday in matting factory will do harm to workers health and they will probably suffer from lung diseases. 目的]生产榻榻米的工人长期接触高浓度粉尘，对其身体的损害极大，并可能产生矽肺，本文拟对青浦区榻榻米生产企业的经济损失做一探讨。
- There is a concentration of people in big cities. 大城市人口集中。
- The carriage left a trail of dust. 马车后扬起了一缕烟尘。
- There's not a speck of dust in their house. 他们的屋里没有一点儿灰尘。
- The cars set off in a cloud of dust. 那些汽车在滚滚尘埃中启动了。
- The truck left clouds of dust in its wake. 车后扬起了一阵尘土。
