free-draining model

例句：

1. 1. The free-draining model is a popular choice for small businesses looking to reduce their water usage.
   自由排水模型是小型企业减少用水的热门选择。
2. 2. This model is designed to be easy to use and free-draining, making it ideal for small gardens.
   这种模型设计简单易用，排水性好，非常适合小型花园。
3. 3. In the construction industry, free-draining models are used to prevent soil erosion andmaintain stability.
   在建筑业中，使用自由排水模型以防止土壤侵蚀和保持稳定性。