他们的南极探险持续了整整六个月。

Their ___exploration of Antarctica lasted for six months.

这部电影是对人工智能道德问题的深入探索。

This movie provides a deep ___exploration of the ethical issues in artificial intelligence.

政府批准了对该地区矿产资源的前期勘探。

The government approved the initial ___exploration for mineral resources in this area.