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.
本文综合前向小角光散理论及消光原理，提出一种测量粉尘平均粒径及粉尘浓度的光学方法。
2
An upright ape living in dust with crude language and tools, all set for extinction.
那时的我们会被称作直立猿人，住在尘土里，使用粗糙的语言和工具，最后全部灭绝。
3
A multi-wave-length extinction detection method for dust is put forward. Then the principle and a principal designing scheme are given.