alkalinity [ˌælkəˈlɪnɪti]

例句:

• A pH test measures the acidity or alkalinity of a substance.
  pH值测试可检测物质的酸碱度。
  
• Incorporating organic material into chalky soils will reduce the alkalinity.
  在白垩质土壤中添加有机物可降低其碱性。
  
• As a result, soil alkalinity rose and farmland lay barren.
  结果, 土壤中的碱份增多,农田成了不毛之地.
  
• Changing the temperature and alkalinity of the ocean changes what grows where.
  来自SA
• I agree with you that lower alkalinity does add to acidification but that was not the point.
  来自SA