plant spareness

例句：

1. 1. The forest isdensely packed with trees, making itdifficult to find a clear path.
   森林里树木密集，很难找到一条清晰的小径。
2. 2.The plant spareness in this area isquite low, which affects the growth ofmany plants.
   这个地区的植物稀疏度很低，这影响了许多植物的生长。
3. 3. The researcherfound that the plant spareness was closelyrelated to the soil quality and climate conditions.
   研究人员发现，植物稀疏度与土壤质量和气候条件密切相关。