英语语法分析

Iron ores and concentrates, including roasted iron pyrites.

铁矿砂及其精矿，包括焙烧黄铁矿。

Its gold content is closely related to pyrites and arsenopyrite.

矿石中的金以不可见金为主，含量与黄铁矿、毒砂关系密切。

This paper deals firstly with the distribution of pyrites in coals.

首先揭示了煤中黄铁矿的分布赋存规律。