effective wellbore radius

例句：

1. 1.The new policy is effective in reducing pollution.
   新政策在减少污染方面是有效的。
2. 2. The software is effective for managing large data sets.
   该软件能有效管理大型数据集。
3. 3. The new product is effective in improving customer satisfaction.
   新产品能有效提高客户满意度。