hard copal

例句：

1. 1.The hard copal was used to make the furniture.
   用硬香胶制作的家具。
2. 2. The hard copal is a natural resource that can be harvested from trees.
   硬香胶是一种可以从树木中采集的天然资源。
3. 3. The hard copal is also used in the production of perfumes and cosmetics.
   硬香胶还用于香水和化妆品的生产。