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1·The concepts of Marine transgression and regression are considered to be fundamental.

海退概念被认为是基本的概念。

2·Whether there was marine transgression in Dongpu depression influences the evaluation of its oil gas resource.

东濮凹陷是否有海侵发生，直接影响着油气资源的评价。

3·The Donghe Sandstone was broadly deposited in the early stage of the marine transgression, but it is not an isochronous stratigraphic unit.

东河砂岩是一套覆盖广泛的海侵初期的沉积产物，但不是一个等时沉积体，相当于晚泥盆世晚期至早石炭世早期沉积，具体沉积时间各地有差异。

4·Marine transgression resulted in the forming of swamp and then the peat swamp. And the transgression later on put the peat formed in advance in deep water environment to form coal in the end.

海侵导致了陆表海盆地沼泽环境的形成，进而形成泥炭沼泽，而随后的海侵事件导致了先形成的泥炭迅速处于深水环境最终成煤。