root of the characteristic equation

例句：

1. 1. The root ofthe problem lies in the lack of communicationbetween the two parties.
   问题的根源在于双方缺乏沟通。
2. 2. The roots of the plant arevisible from a distance.
   这株植物的根部从远处就能看到。
3. 3. Thecompany's success canbe traced back to itsstrong roots in the industry.
   这家公司的成功可以追溯到其在行业中的坚实基础。