enzymes active in acid or alkaline medium

例句：

1. 1. Enzymes play a crucial role in the metabolism of carbohydrates.
   酶在碳水化合物的代谢中起着关键作用。
2. 2. The enzyme is responsible for breaking down complex molecules into simpler ones.
   该酶负责将复杂的分子分解成更简单的分子。
3. 3. The discovery of new enzymes has led to significant advancements in biotechnology.
   新酶的发现在生物技术领域取得了重大进展。