radix of lung

例句：

1. 1. The root of the problem lies in the mismanagement of resources.
   问题的根源在于资源的管理不善。
2. 2. The company's success is built on strong customer relationships.
   公司的成功建立在与客户的良好关系上。
3. 3.The roots of this disease are caused by a lack of exercise.
   这种疾病的成因是缺乏运动。