开始发育

例句：

1. 1. The company has been developing new products for the past five years.
   这家公司在过去五年里一直在开发新产品。
2. 2. The scientist is developing a new vaccine to combat the virus.
   这位科学家正在开发一种新的疫苗来对抗这种病毒。
3. 3. The forest is developing into a dense and lush ecosystem.
   这片森林正在发展成为一片密集而繁茂的生态系统。