動(dòng)詞 round off:

1. make round
   同義詞：round, round out, round off
2. bring to a highly developed, finished, or refined state
   同義詞：polish, round, round off, polish up, brush up
3. express as a round number
   同義詞：round off, round down, round out, round

1. He rounded off his short speech by thanking everyone who had assisted him.
   他對(duì)幫助過(guò)他的每個(gè)人表示了謝意，以此結(jié)束了他簡(jiǎn)短的講話(huà)。
2. She rounded off the corners of the table with sandpaper.
   她用砂紙把桌角打磨光了。