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.

和主要赋存在方、和方中，这3种物以植物胞腔充填形式现，属于化学沉积成因。

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.

铅和硒主要赋存在方铅矿、硒铅矿和硒方铅矿，3矿物植物胞腔充填形式现，属于化学沉积成因。

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.

和主要赋存在方、和方中，这3种物以植物胞腔充填形式现，属于化学沉积成因。

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.

铅和硒主要赋存在方铅、硒铅和硒方铅，3种物以植物胞腔充填形式现，属于化学沉积成因。

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.

铅和硒主要赋存在方铅矿、硒铅矿和硒方铅矿中，这3种矿胞腔充填形式现，属于化学沉。

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.

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现，属于化学沉积成因。

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.

铅要赋存在方铅矿、铅矿方铅矿中，这3种矿物以植物胞腔充填形式现，属于化学沉积因。

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.

铅和硒主在方铅矿、硒铅矿和硒方铅矿中，这3种矿物以植物胞腔充填形式现，属于化学沉积成因。

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.

铅和硒主要赋存在方铅矿、硒铅矿和硒方铅矿中，这3种矿物以植物填形式现，属于积成因。