英语语法分析

Uranium is frequently enriched by sorption or chemical combination in shales, lignites and phosphorites.

铀经常为页岩，泥炭和磷块岩所吸附或化学结合态而富集。

Uranium, germanium-bearing coals are mainly lignites of low grade incoalation and belong to semidurain, semiclarain.

含铀、锗煤主要为煤化程度低的褐煤，属于半暗-半亮、暗-亮煤及亮-暗煤。

In the reburning zone using lignites as reburning fuels, the heterogeneous mechanisms may be an important contributor to NO reduction.

褐煤作为再燃燃料时，煤焦的异相还原机理对NO还原起重要作用。