digestive juice

名词 digestive juice:

1. secretions that aid digestion
   同义词：digestive fluid

1. Over the periods their saliva, a mild, digestive juice like our own, was converted into a poison that defies analysis even today.
   经过若干演化阶段，蛇的唾液，一种温和的助消化的象人们的唾液一样的液体变成了甚至在今天也难以分析的毒液。