Roman cement的意思
天然水泥，罗马水泥
Roman cement的短语
1、 Roman n cement 天然水泥
Roman cement的例句
The Roman Empire mastered cement making, and some of that culture's masonry Bridges still stand 2,000 years later, author Courland said.
作者Courland说，罗马帝国掌握了水泥的制造，并且在当时建筑文化下的砌体结构保持了2000多年。
Cement was lacking, of course, but, as in the case of certain Roman walls, without interfering with its rigid architecture.
墙上显然缺乏水泥，但正象某些罗马的墙壁，对建筑物本身的坚固朴实却丝毫无损。