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1·The result shows that the nitrate contents in vegetables has surpassed the standard content set by the World Health Organization. Lead and mercury contents have also surpassed a half.

结果表明，蔬菜的硝酸盐含量均值已超过世界健康组织规定的含量标准，铅、汞含量也有一半以上超标。

2·The continuous determination of arsenic and lead in the solution of the same sample by spectrophotometry is described, based on the reaction between hydrides and silver nitrate.

本文提出了以氢化物与硝酸银反应为基础的在一份试样溶液中连续测定微量砷和铅的分光光度法。

3·Alveolar oxygen into nitrogen compounds, lead to the formation of nitrite and nitrate, a sharp stimulus to the lung tissue, increased pulmonary capillary permeability, leading to emphysema.

氮氧化合物进入肺泡后，能形成亚硝酸和硝酸，对肺组织产生剧烈的刺激作用，增加肺毛细管的通透性，最后造成肺气肿。

4·Oxidation of yellow lead monoxide by a fused sodium chlorate-sodium nitrate mixture;

熔合通过或似通过熔化将（各成分）混合在一起；