探险队潜入了洞穴的最深处。

The expedition team reached the ___depths of the cave.

他在隆冬季节的严寒中独自徒步穿越了山区。

He hiked alone through the mountains in the ___depths of winter.

这部电影深刻探讨了人性的复杂层面。

The movie delves into the ___depths of human nature.