须根

例句：

1. 1. The plant's root system is extensive, allowing it to grow deep into the soil.
   这植物的根系发达，能深入土壤生长。
2. 2. The roots of the tree are visible through the soil, indicating that it has been planted for a long time.
   树的根系在土壤中可见，表明它已经种植很久了。
3. 3. The roots of the plant absorb water and nutrients from the soil, supporting its growth.
   植物的根系从土壤中吸收水分和养分，支持其生长。