Development of new drug的用法和樣例：
例句
- The study on anticancer effects and mechanisms of compositions from Chinese materia medica in vivo is very necessary for new drug development.
通過動物實驗研究中藥抗腫瘤作用及機制是新葯開發的必要途徑。 - Because of small content in the plant, complicated extracting procedure and poor purity, the process of new drug R&D based on Danshensu has been hampered acutely.
然而，丹參素在植物中的含量甚少，提取工藝複雜且純度不高，這嚴重阻礙了以其為基礎的新葯開發進程。
