resinous acid

例句：

1. 1. The chemical was extracted from the resinous tree bark.
   这种化学物质是从树脂树的树皮中提取出来的。
2. 2. Resinous acids are used in the productionof plastics.
   树脂酸用于生产塑料。
3. 3.The resinous acid is a complexmixture of organic compounds.
   这种树脂酸是有机化合物的复杂混合物。