An oxidation catalyst deposited on a filter substrate for the removal of CO, hydrocarbons, and particulate matter, such as soot, from an exhaust stream wherein the oxidation catalyst is formed from a platinum group metal supported on a refractory oxide, tin oxide, and a zeolite.
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dissolved and particulate organic matter 溶解的和颗粒的有机质
particulate matter and diatom fluxes 颗粒物质和硅藻通量
Suspended Particulate Matter and plankton 深海悬浮颗粒物和浮游生物
This mixture with varying amounts of moisture and particulate matter, enveloping Earth; the atmosphere.
大气覆盖地球的不同量的湿气和特殊物质的混合物；
The negative influence of nitrogen oxide and particulate matter to environment and to human body has been paid more and more attention in recent days.
氮氧化物和微粒对环境和人体的不利影响也越来越受到关注。
Wind can blow pollution to Beijing from thousands of miles away, while a lack of wind can cause chemicals and particulate matter to build up in the city.
风会从几千英里以外把污染吹到北京，然后如果没有风，化学物质和微粒就会在市内累积。
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