探勘井

例句：

1. 1.The geologists are conducting a thoroughexploration of the underground caverns.
   地质学家正在对地下洞穴进行彻底的勘探。
2. 2.The company has been exploring new markets forits products.
   该公司一直在探索新的市场来推广其产品。
3. 3. The engineers are investigatingthe cause of the sudden drop in oilproduction.
   工程师们正在调查石油产量突然下降的原因。