alkaline filler

例句：

1. 1. The soil is alkaline, which affects the growth of plants.
   土壤是碱性的，这影响植物的生长。
2. 2.The pH level of the solution is important for determining its alkaline properties.
   溶液的pH水平对于确定其碱性属性很重要。
3. 3. The manufacturer claims that their product is free from alkaline substances.
   制造商声称他们的产品不含碱性物质。