During our accommodation there, nobody came to clean up the room and the staff was not very friendly.

clean 是动词，意思是"清洁、打扫"。 up 在这里是副词，与动词 clean 搭配使用，表示"彻底、完全"的意思。 clean up 是一个短语动词，意思是"彻底打扫、清理干净"，通常指对某个区域或物品进行全面清洁。