上上下下; 起落

上上下下；到处；前前后后；来来往往

ups and downs───n.沉浮；盛衰；高低

up and doing───敏捷；忙碌；活泼

cap and gown───学位服

to hand down───传

hand down───宣布；把…传下去

plane down───刨平

sand down───用砂纸磨光表面

stand down───退出（比赛或竞选）；离开证人席；退职；顺潮航行

to stand down───退出

A little bird was bobbing its head up and down.───一只小鸟把头上下快速摆动着.

He kept pumping my hand up and down.───他不停地摇动着我的手。

Then I noticed the car was bouncing up and down as if someone were jumping on it.───然后我注意到那辆车在上下颠簸，好像有人在车上蹦跳似的。

The piston slides noiselessly up and down.───这个活塞上下活动,没有响声.

He paced up and down restlessly, trying to put his thoughts in order.───他坐立不安地走来走去，尽力想理清思绪。

There's a lot of rushing up and down the gangways.───舷梯上许多人上上下下。

He could not lie still, but rampaged up and down his bedroom.───他不能静静地躺着, 而在卧室里冲来撞去.

Soldiers were marching up and down outside the government buildings.───士兵在政府大楼外面来回练习队列行进。

"What is wrong with you, acting like that," she raved, pacing up and down frantically.───“你是怎么回事，竟然做出那种事，”她咆哮着，发疯一样走来走去。

Window cleaners are pulled up and down tall buildings on cradles.───窗户清洁工乘坐能升降的吊篮清洗高层建筑物的窗子.

She was jumping up and down.───她上上下下地蹦着.

He was looking up and down the road as if he were expecting someone.───他向大道上张望着,好像盼着什么人呢!

He jigged up and down with excitement.───他激动得又蹦又跳。

He introduced himself as "the leader" and strutted up and down like a peacock.───他自称“领导”，像个孔雀似的趾高气扬地走来走去。

The child stared the stranger up and down.───那孩子上下打量着这个陌生人.

The waves were about five feet now, and the bow of the boat was leaping up and down.───那时浪高大约有5英尺，船头在上下颠簸。

I don't think a lot of people will jump up and down and say "thank heavens"..───我并不认为很多人会欣喜若狂地说“感谢上帝”。

The water buffalo squelched up and down the paddy fields, pulling the plough.───水牛拉着犁,在稻田里咕唧咕唧地走着.

He paced nervously up and down on the platform.───他在站台上情绪不安地走来走去.

This is a subject very dear to the hearts of academics up and down the country.───这个话题举国上下的学者都非常关切。

I strolled up and down thoughtfully before calling a taxi.───我踱来踱去仔细思量后叫了一辆出租车。

The tiger paced up and down the cage.───老虎在笼中走来走去.

He paced up and down, fulminating against Thomas.───他一边来回踱步, 一边大声怒斥托马斯.

He immediately threw a tantrum, screaming and stomping up and down like a child.───他立即耍起性子来，像小孩似的跺着脚又叫又跳。

I looked up and down the corridor.───我来回扫视着走廊。

They came into the front hall, stamping their boots and jumping up and down to knock the snow off.───他们进入了前厅，跺着靴子，蹦跳着抖掉身上的雪。

We bobbed gently up and down on the swell of the incoming tide.───我们随着涨潮的浪涌轻轻地起伏。

With an elevator in the skyscraper , we can easily go up and down.───摩天楼里有电梯, 上下很方便.

If you run your eye up and down these columns you will see that the value of some of them declined.───你把这几列上下扫视一遍，就会发现其中有些贬值了。