奥尔特云是一个由粉尘和冰组成的庞大云带，据信它距离太阳约一光年，许多穿越我们太阳系的彗星都来自那里。
The Oort cloud is a vast belt of dust and ice that is believed to lie around one light year from the Sun and is the origin of many of the comets that pass through our solar system.
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.
介绍了臭气粉尘原位治理装置的组成、工作原理、优点、用途，以及该装置在环卫行业中的应用。
The composition, operational principle, advantage, function of in-situ treatment installation of odor and dust, and its application in environmental sanitation industry were introduced.
应用推荐