acidic

形容词 acidic:

1. being or containing an acid; of a solution having an excess of hydrogen atoms (having a pH of less than 7)
2. being sour to the taste
   同义词：acid, acidulent, acidulous

1. The soil becomes more and more acidic as pollution mounts up.
   随着污染的加剧，土壤的酸化越来越严重。