exploratory development

例句：

1. 1. The company is exploring the possibility of expanding its operations into new markets.
   该公司正在探索将业务扩展到新市场的可能性。
2. 2.The government's exploration of renewable energy sources has been a major focus in recent years.
   政府对可再生能源的探索是近年来的一个主要焦点。
3. 3. The scientist conducted an exploratory study to investigate the effectiveness of the new drug.
   科学家进行了一项探索性研究，以调查新药的有效性。