2.R esults show that the modified cement with good durability, small expansion and low alkality can be made by use of gypsum and zeolite modifying alumina cement.
11.The Mosul Dam, the largest in Iraq which produces hydroelectricity, is built on a foundation of soft gypsum rock, making erosion a constant challenge.
十九世纪冒险故事 Thrilling Adventures By Land And Sea by James O. Brayman
12.Here, to my surprise, I found myself on the banks of a broad arroyo, whose water, clear and shallow, ran slowly over a bed of sand and gypsum.
在这里,令我惊讶的是, 我发现自己在个宽阔的阿罗约河岸上,河水清澈而浅, 缓缓地流过沙子和床。机翻
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人性的弱点(上)
13.During the years that Jim Farley traveled as a salesman for a gypsum concern, and during the years that he held office as town clerk in Stony Point, he built up a system for remembering names.