derived density

例句：

1. 1. The new drug is derived from a plant extract.
   这种新药是从植物提取物中提取出来的。
2. 2.The scientist discovered that the molecule was derived from bacteria.
   科学家发现这个分子是由细菌产生的。
3. 3.The company's profits are derived from its successful product line.
   公司的盈利来自于其成功的产品系列。