颗粒物质 kēlìwùzhì particulate matter Definitions Defs Origin Strokes Stroke Words Sentences Sents 颗粒物质 顆粒物質 kēlìwùzhì particulate matter Masses of solid particles larger than one micron, often produced by fuel combustion or industrial processes, and a major source of air pollution
颗粒物质 顆粒物質 kēlìwùzhì particulate matter Masses of solid particles larger than one micron, often produced by fuel combustion or industrial processes, and a major source of air pollution
