What is the function of a thūpa?
塔是作什么用的？

Thūpa (S. stūpa), rendered into Chinese as "Ta", "Tabo" or "Sudubo", means "tower" or "tomb". Thūpas are usually built for keeping sarīra, though some are for commemorative purposes.
“塔”又称“塔波”，是梵语Stūpa（P. Thūpa）省略的音译，完整的音译是“窣堵波”，意义是“高显”或“坟”。塔一般是藏舍利的，也有不藏舍利而作为标志纪念之用的。