1. The daily routine can sometimes feel submundane and monotonous.
日常工作有时会感觉平凡而乏味。

2. She longed for an extraordinary life, far beyond the submundane existence she currently had.
她渴望过一种非凡的生活，远远超越她现在平庸的生存。

3. The submundane tasks fell on the interns, while the senior staff focused on more important matters.
平凡的任务都交给了实习生，而高级员工则专注于更重要的事情。