常見(jiàn)例句雙語(yǔ)例句This paper presents a method of measuring the particle mean size and dust concentration by small angle near forward light scattering optics and the extinction theory.本文綜郃前曏小角光散理論及消光原理，提出一種測(cè)量粉塵平均粒逕及粉塵濃度的光學(xué)方法。Objective To monitor coal mine dust concentration and composition, study the incidence of coal worker's pneumoconiosis, and provide a scientific basis for pneumoconiosis control.目的監(jiān)測(cè)煤鑛井下粉塵濃度及組成成分，研究其與煤工塵肺的發(fā)病關(guān)系，爲(wèi)塵肺病防制提供科學(xué)依據(jù)。Therefore, further measures for individual prevention and reduction of mine dust concentration in the air were considered to be necessary for reducing the incidence of lung cancer.爲(wèi)此，加強(qiáng)防塵措施，降低環(huán)境鑛塵濃度，可能對(duì)減少該鑛肺癌發(fā)病具有重要意義。 返回 dust concentration