meandrine

例句：

1. 1. The medicine was effective in treating the patient's condition.
   这种药物对病人的病情有效。
2. 2. The chemical compound has been used in industry for many years.
   这种化学化合物已经在工业中使用了很多年。
3. 3. The researcher discovered a new method to improve the efficiency of the manufacturing process.
   研究者发现了一种新的方法来提高制造过程的效率。