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。
Cement was lacking, of course, but, as in the case of certain Roman walls, without interfering with its rigid architecture.
本文通过研究罗马尼亚s_2油井水泥在高温下形成水泥石的强度衰退规律,提出合理的加砂量并讨论了应加砂的温度范围。
This paper proposed the reasonable amount and the temperature of adding silica flour after studying the strength retrogression of Romania S_2 oil cement at high temperature.
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。
The Roman Empire mastered cement making, and some of that culture's masonry Bridges still stand 2,000 years later, author Courland said.
古罗马人已经发现火山灰制作的水泥质量更好。
The ancient Romans discovered that volcanic ash made better cement.
古罗马人已经发现火山灰制作的水泥质量更好。
The ancient Romans discovered that volcanic ash made better cement.
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