file down
片語動詞所屬單字file
file down — 片語動詞
1. to rub a rough or sharp part of an object with a file until it becomes smooth or
1.片語動詞
釋義
銼平；磨平
to rub a rough or sharp part of an object with a file until it becomes smooth or flat
例句
Daniel filed down the rough spot on the door frame so the paint would stick.