探险队深入洞穴的深处寻找古代遗迹。

The explorers ventured into the ___bowels of the cave searching for ancient relics.

他悲惨的故事触动了听众的恻隐之心。

His sad story moved the ___hearts of the audience.

吃了不干净的食物后，他感到肠道疼痛。

After eating unclean food, he felt pain in his ___bowels.