英语语法分析

There is not the contemporary plate-tectonic system in the researching area. However, the active forms of polycycle trough (basin) developed in the area.

本区不存在现代板块构造体系，而具有多旋回海槽(盆)的活动形式。

This paper first expounds the Polycycle Theory of Mr. Huang Jiqing related to oil and gas in the Sichuan Basin, then enumerates the development and characteristics of 6 great cycles.

该文首先阐述黄汲清先生四川盆地油气多旋回理论，列举六大旋回特征。