例句：
She paced up and down outside the room.
她在屋子外面來回走著。
My relationship with him was up and down.
我跟他的關(guān)系忽冷忽熱。
The boat bobbed up and down on the water.
小船在水面顛簸。
I looked it up on the Internet.
我在互聯(lián)網(wǎng)上查過此事。
Sales are well up on last year.
銷量比去年大幅增加。
The ship broke up on the rocks.
船觸礁撞碎了。
He continued working up until his death.
他一直工作到去世。
I often stayed up until two or three in the morning.
我經(jīng)常熬夜到凌晨兩三點鐘。
Don't give up until you have exhausted all the possibilities.
只要還有可能就別放棄。