大家都搜：
起落
上升和下降
波动
一上一下的
1、walk up and down───来回走着
2、peduncle up and down───花梗上下
3、goes up───上升；增长
4、up and down───上上下下; 起落；上上下下；到处；前前后后；来来往往
5、up down up up down───向上向下向上向下
6、sun goes down───太阳下山了
7、teeming up and down───大起大落
8、goes down───下跌；降落（go down的第三人称单数）；下跌；降落（godown的第三人称单数）
9、it goes down───它下降了
1、The amount of power people use goes up and down, but it stays above a certain level all the time.───人们的耗电量忽上忽下，但总会在一定水平之上。
2、Her legs are stronger, she begins to run and goes up and down stairs and toboggans with great decision. We think her.───她的脚强壮了一点，她开始跑了，并且在楼梯上跑上跑下，并且有胆子坐在雪橇上。我想她是个很。
3、The sun, is also variable over a long term: its heat output goes up and down in cycles, the latest trend being downward.───太阳在长期内也是变化的：它的热量输出在周期中有上升，也有下降，最近的趋势是下降。
4、While the sun goes up and down, life goes on.───在太阳的起起落落中，生活在继续着。
5、My mother has blood pressure problems, and her pressure goes up and down like crazy now because of worrying about him and stuff.───我妈妈有血压问题，因为Cao心他的事，血压疯狂起落。
6、Researchers learned that the lever of testosterone in a fetus goes up and down as the fetus develops.───研究人员已经查明，随着胎儿的生长，其Gao丸激素的多少在不断变化。
7、They pay close to US$5, 000 to participate in the race, which goes up and down muddy, snowy hills and across icy streams.───他们要支付高达五千美元的参赛费，途经高低起伏、泥泞而满是积雪的山丘，还要穿越冰冷的溪流。
8、though the weekly death toll goes up and down, the strife is worsening.───虽然每周的死亡人数有所下降，但冲突仍在加剧。
9、The stock market goes up and down like the roller coaster on the beach just up the Pacific from where I am now.───股票市场就如同我现在所处的太平洋沿岸海滩上的云霄飞车一样忽起忽落。
1、Inflation goes up and down depending on the state of the economy.
2、Again her heart is represented by the mechanism from an old lift: she goes up and down as others will her.
3、Grab the handrail tightly when boat goes up and down.
4、Your basis in your S corporation goes up and down as time goes by and things happen.
5、Mark Zumberge: Basically a seismometer is a box with a spring with a mass hanging inside, and as the ground shakes the mass goes up and down.