A primary use of testing the weight percentages of nitrogen, carbon, hydrogen, oxygen and sulfur within a variety of solid or liquid explosive of pure organic compounds.
主要测试无爆炸性之各种固态或液态之纯质有机化合物中的氮、碳、氢、氧及硫之重量百分率。
Motor vehicles are the primary source of several important air pollutants: carbon monoxide, volatile organic compounds, and nitrogen oxides.
机动车辆是几种重要的空气污染物的主要来源：一氧化碳、挥发性有机化合物，和氮氧化物。
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