unified soil classification system造句

例句与造句

1. Unified soil classification system
   土的统一分类系统
2. Unified soil classification system
   统一土壤分类法
3. Standard classification of soils for engineering purposes unified soil classification system
   施工用土壤的标准分类
4. It's difficult to find unified soil classification system in a sentence. 用unified soil classification system造句挺难的