extent of the root system

例句：

1. 1.The extent of the root system is crucial for plant growth and survival.
   根系统的广度对植物的生长和存活至关重要。
2. 2. The extent of the root system can vary greatly depending on the type of plant.
   根系统的广度可以根据植物的类型有很大的差异。
3. 3. The extent of the root system is often determined by the amount of soil available.
   根系统的广度通常由土壤的可用量决定。