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1·Do you get puffed out running up and down the stairs?

你会因为跑上跑下楼梯而气喘吁吁吗？《柯林斯英汉双解大词典》

2·He looked up and down the rain-swept street.

他上下大量着下着大雨的街道。《柯林斯英汉双解大词典》

3·All up and down the street the windows bang shut.

整条街的窗户都砰砰关上了。《柯林斯英汉双解大词典》

4·He kept bouncing up and down like a yo-yo.

他像个悠悠球似的蹦蹦跳跳。《牛津词典》

5·He jigged up and down with excitement.

他激动得又蹦又跳。《牛津词典》

6·She paced up and down outside the room.

她在屋子外面来回走着。《牛津词典》

7·My relationship with him was up and down.

我跟他的关系忽冷忽热。《牛津词典》

8·Tiny boats bobbed up and down in the harbour.

小船在港湾中颠簸。《牛津词典》

9·The boat bobbed up and down on the water.

小船在水面颠簸。《牛津词典》

10·The children jumped up and down to keep warm.

孩子们上下跳动保持身体暖和。《牛津词典》

起伏的

1·Events such as the financial crisis and climate change are not quirks of the marketplace, or quirks of nature. They are not inevitable events in the up-and-down cycle of human history.

金融危机和气候变化等事件并非市场作乱或大自然播弄的结果，它们并不是人类起伏不定的历史中不可避免的事件。

2·Two men can chop down even a thick, sturdy rosewood tree in an hour. Then it requires teams of 15 or 30 or 50 to pull the logs through the muddy up-and-down of the vine-covered woodland.

砍倒一棵粗壮坚固的紫檀树只需要花费两名男子一个小时的时间，但要将这段原木从满是泥泞藤蔓丛生的起伏林地里拖出来则需要15到30人，有时甚至是50人。

3·They are not just temporary dips and blips in the up-and-down cycle of human history.

它们绝不仅仅是人类历史起伏循环中的一段短暂的坎坷。

4·His rookie season was up-and-down, with a fast start, a peak in late December, then a slow fall-off that had people questioning his drive and his mental conditioning.

新秀赛季充满了起伏，一开始进展颇为顺利，12月底到达顶点，之后开始慢慢下滑，以至人们开始质疑他打球的动力和精神状态。