catechol tannin

例句：

1. 1.The catechol in the plant is essential for its growth.
   植物中的酚类化合物对其生长至关重要。
2. 2. Catechol is a compound that reacts with acids to form colored compounds.
   酚类化合物与酸反应形成有色化合物。
3. 3. The catechol in the plant helps protect it from harmful UV rays.
   植物中的酚类化合物有助于保护它免受有害的紫外线伤害。