effective alkalinity

例句：

1. 1.The soil's effective alkalinity is crucial for plant growth.
   土壤的有效碱度对植物生长至关重要。
2. 2. The manufacturer claims that their product has an effective alkalinity of 90%.
   制造商声称他们的产品具有90%的有效碱度。
3. 3. The test results showed that the water had a high effective alkalinity.
   测试结果显示，该水具有较高的有效碱度。