alkaline       
adjective uk/ˈæl.kəl.aɪn/ us/ˈæl.kəl.aɪn/
 碱性的
having an effect or chemical behaviour opposite to an acid
  Some plants will not grow in very alkaline soils. 有些植物不会在非常碱性的土壤中生长。 
 Ocean water today is somewhat alkaline.  今天的海水带点碱性。 
 See: alkali
 - More examples
- Normally, seawater is slightly alkaline.
- Because it's an alkaline substance, baking soda helps neutralize acidity.
- alkaline batteries