plantaris muscle

例句：

1. 1. The plant's root system is essential for its survival.
   植物的根系统对其生存至关重要。
2. 2. In botany, the plant's root system is studied to understand how it absorbs water and nutrients.
   在植物学中，研究植物的根系统是为了了解它如何吸收水分和养分。
3. 3. The plant's root system is responsible for anchoring the plant in the soil.
   植物的根系统负责将植物固定在土壤中。