expensive soil

• 膨胀土

expensive soil的用法和样例：

例句

1. The microcosmic structure of the undisturbed soil sample done by lyophilization is tested.
   对冻干法制备的广西膨胀土不扰动样进行了微结构测试研究。
2. The paper introduces the construction craft and quality control of lime improved dilatable soil of Hening Railway.
   介绍合宁铁路石灰改良膨胀土施工工艺及质量控制。