1PHRASAL VERB (用砂纸等)打磨平滑 If you rub down a rough surface, you make it smooth by rubbing it with something such as sandpaper. (用砂纸等)打磨平滑 [Also VERB n PREPOSITION]
They were settling to their work, rubbing down the woodwork with sandpaper. [VERBPREP. noun (not pronoun)]
他们开始工作,用砂纸把木制品打磨平滑。
2PHRASAL VERB (用布、毛巾等)擦干,按摩 If you rub someone down, you dry them or massage them with something such as a towel or cloth. (用布、毛巾等)擦干,按摩
He set him on the bed and rubbed him down with a coarse towel. [VERB noun PREP.]
他让他躺到床上,用一条粗糙的毛巾给他擦干了全身。
After a bath or shower rub down the whole body with a loofah. [VERBPREP. noun (not pronoun)]