concrete wall

基本解释

A path, marked by a long concrete wall leads the visitor away from the main structure toward a workshop complex consisting of a two-story square building.
一条靠近长长的混凝土墙体的小径将参观者带离主体建筑，通向一座两层的工厂建筑。
Even the slightest advantage can win battles, so various weapons were designed to allow soldiers to see around corners, and fire around them behind the protection of a concrete wall.
即使只有一点点优势也可以赢得战斗，因此就设计出了各种各样的武器使得战士们可以看清拐角处并且在保垒墙的保护下射击。
Later on, while I waited with hundreds of people to get on the D.C. Metro subway system, a friend and I looked through photos from the day by projecting the camera's images onto a concrete wall.
后来我跟几百个人一起等地铁时，一个朋友和我将照片投射到一面混凝土墙壁上，浏览了当天的照片。

The barbed-wire and barricades that surround coalition facilities were eschewed, in favour of a plain concrete wall.
ECONOMIST: The Iraqi bombs
On the concrete wall behind him were large framed images of Queen Elizabeth and literary icon Samuel Beckett.
FORBES: Queen Elizabeth II
After rescuers cut a window-size opening in the concrete wall, Chatman climbed in to help apply the soapy substance.
NPR: Rescuers Free Woman Wedged Between 2 Buildings