草根土

例句：

1. 1. The farmer carefully dug upthe roots of the plant to check itshealth.
   农民小心翼翼地挖出植物的根来检查它的健康状况。
2. 2. The company's successis built on a solid foundation of customerservice.
   公司的成功建立在坚实的客户服务基础之上。
3. 3. The newpolicy will have a profound impact on thecountry's economic development.
   新政策将对该国经济发展产生深远影响。