unclean surface

例句：

1. 1.The room was left in a state of disarray after the party.
   派对结束后，房间一片混乱。
2. 2.The workers were instructed to clean up any unclean surfaces before leaving the building.
   工人们被告知在离开大楼前清理任何不洁的表面。
3. 3. The new paint job on the wall made it look much cleaner than the previous one.
   墙上的新油漆工作让墙面看起来比之前的要干净得多。