protopine

例句：

1. 1. The protopine bark is used in traditional medicine for its anti-inflammatory properties.
   香胶树的树皮在传统医学中因其抗炎性质被使用。
2. 2.In the forest, protopine trees provide a habitat for many species of birds and insects.
   森林中的香胶树为许多鸟类和昆虫提供了栖息地。
3. 3.The protopine tree produces a sweet, aromatic gum that is used as a natural preservative.
   香胶树产生一种甜美的芳香树脂，用作天然防腐剂。