common gypsum powder [矿业] 普通石膏生粉
The yellow substance was gypsum, or calcium sulfate dehydrate, a common component of plaster.
这种黄色的物质叫做脱水硫化钙，通常是石膏的一种组成部分。
At the Borup Pass spring, hydrogen sulfide gas in the water is converted to stable deposits of either elemental sulfur, the most common material in the deposit, or gypsum.
波鲁普峡湾泉水中的氢化硫转化为稳定的沉积物。或为单质硫——这是沉积物中最普通的成分，或为石膏。
High rates of evaporation deposit thick layers of salt minerals, such as common table salt and gypsum (a chalky mineral that is a major component of wallboard).
极高的蒸发率使厚实的盐矿逐渐沉积，包括食用盐和石膏层(一种白垩矿，是墙板壁的主要成分)。
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