the characteristics of lead pollution
the characteristics of lead pollution
铅污染的特点
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The concentration of lead in atmosphere and the main types and emission characteristics of pollution sources in China are summarized and estimated.
总结和评价了我国大气铅浓度水平、大气铅污染源的主要类型和排放特征，对今后我国大气铅污染发展趋势进行了说明。
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