Radix Rhapontici

例句：

1. 1. The plant's root system is extensive and supports a large population of insects.
   这植物的根系广泛，支撑着大量的昆虫。
2. 2. The scientist studied the structure of the plant's stem to understand its growth patterns.
   科学家研究了这植物茎的结构，以了解其生长模式。
3. 3. The roots of the tree are visible in the soil, providing support for the tree's growth.
   这棵树的根部在土壤中可见，为树的生长提供支持。