marshland

n. 沼泽地

A tract of marshland, usually under water and covered in places with tall grass.

沼泽地沼泽地带，常被水漫过并被较高的草所覆盖

In the long March, our Red Army soldiers succeeded in wading through the marshland.

长征中，我们的红军战士成功地涉过了沼泽地。