英语语法分析

The crack in the coal seam is divided into two kinds: endogenic crack and exogenous crack.

煤层中的裂隙分两种，即外生裂隙和内生裂隙。

According to geological performances, Chinese phosphate deposits may be grouped into endogenic, exogenic and metamorphic.

以地质作用为主要依据，将中国磷矿分为内生磷矿床、外生磷矿床和变质磷矿床三大类。

Endogenic and exogenic gold deposits in metamorphic regions in Hunanare characterized by occurrence of high-percentage single natural gold.

湖南变质岩区的内生与外生金矿床均以高成色的单一自然金产出为特征。