1.Lead and selenium mainly exist in galena, clausthalite, and selenio-galena which occur as cell-filling of coal-forming plants and are of chemical-sedimentary origin.

1.铅和硒主要赋存在方铅矿、硒铅矿和硒方铅矿中，这3种矿物以植物胞腔充填形式出现，属于化学沉积因。

2.The sythesis of Monuron herbicide by oxidative-reductive carbonylation of dimethyamine and p-ClC6H4NO2 using selenium as catalyst and organic base as cocatalyst was studied.

2.研究了以硒催化剂,有助催化剂,对氯硝基苯和二甲反底物,经高选择性氧化还原羰基化一灭草隆除草剂。

3.The results indicated that the trace elements molybdenum and zirconium increased considerably the gas yields of the lignitic organic matter while selenium did not.

3.分析结果表明,除硒元素外,随着钼元素和锆元素的加入,褐煤有质气态产物的生量显著提高。

4.The high quantily of proteinfat and the concentration of IronZinc and Selenium ions in the medium is more advantageous to bioconcentration of edible fungi.

4.提高培养基中蛋白质、脂肪和铁、锌、硒的浓度，有利于食用菌对铁、锌、硒的富集。

5.Conclusion Selenium can promote the function of the ACTH positive cells in the pars distalis of rat pituitary with colon mucosa cancer induced by AOM.

5.结论 硒可增强AOM所致大鼠结肠癌形过程中垂体远侧部ACTH阳性细胞的功能。

6.Objective: To observe the effect of selenium on the TSH positive cells in the pituitary pars distalis of rat with colon mucosa cancer induced by azoxymethane (AOM).

6.观察硒对氧化偶氮甲烷(AOM)所致大鼠结肠癌形过程中，垂体远侧部促甲状腺激素(TSH)阳性细胞的影响。