resin acid

例句：

1. 1. Resin is a natural product that can be used to make various products.
   树脂是一种天然产品，可以用来制作各种产品。
2. 2.The resin was extracted from the tree and used for making furniture.
   从树上提取的树脂被用来制作家具。
3. 3.The resin was used as a solvent in the manufacturing process.
   在制造过程中，树脂被用作溶剂。