副詞 up and down:

1. moving backward and forward along a given course
2. alternately upward and downward

1. She paraded up and down in her new hat.
   她戴著新帽子在人前走來(lái)走去。
2. A butterfly is flying up and down among the flowers.
   有一只蝴蝶正在花叢里忽上忽下地飛著。
3. The teacher was walking up and down in the classroom.
   老師在教室里走來(lái)走去。
4. They were jigging up and down to the music.
   他們隨著音樂(lè)的節(jié)拍輕快地上下跳著。
5. We bumped up and down along the gravel path.
   我們沿礫石小路顛簸而行。
6. He was walking up and down the station platform.
   他在火車(chē)站的月臺(tái)上走來(lái)走去。
7. I don't mind living in a top flat. Going up and down stairs will be good exercise for me.
   住頂樓，我不在乎。上上下下爬樓梯對(duì)我會(huì)是很好的鍛煉。
8. Johnson looked her up and down and decided to ask her out.
   約翰遜上上下下打量了她一番，決定邀請(qǐng)她出去。