development threshold

例句：

1. 1. The development threshold for renewable energy is still being determined.
   可再生能源的发展门槛仍在确定中。
2. 2.The company has set a development threshold for new products.
   该公司已为新产品设定了发展门槛。
3. 3. The research team has identified the development threshold for this process.
   研究团队已经确定了这一过程的发展门槛。