上上下下

I like the feeling in my tummy when the elevator goes up and down. It's kind of exacting.

我很喜欢乘坐电梯时候，电梯上上下下的那种感觉，很让人兴奋的。

That conflict flares up and down for 10 years.

那种冲突上上下下飘忽了10 年。

The design of riding horse was too flighty with up and down movements, which was playful and funny.

骑马马设计得太"油爆"，一上一下、上上下下的很好玩也很搞笑！

Goosey gander Goosey, goosey, gander, Whither shall I wander?

在我的女士房间里上上下下。

Hamel walking up and down with his terrible iron ruler under his arm.

Hamel 上上下下走与他可怕的钢统治者在他的胳膊之下。

Up and down and back and forth she trampled the loose hay with all the might of her legs, while the forkfuls kept coming over and falling, and she went on trampling while the wagon jolted on to the next haycock.

她就这样上上下下前前后后的用腿上所有的力气踩踏着松散的干草，一叉一叉的干草不断地翻滚下来，她也就继续踩踏，而马车也颠簸的走向下一个草垛。

Up and down, fast and hard, her legs kept going, the length of the hayrack and back, and across the middle.

她的脚不停的上上下下，既快又结实地在木框里前前后后左左右右的踩着。

Sit still, Valerie, you're up and down like a jack-in-the-box.

瓦莱里，坐着别动，你象玩具跳偶似的上上下下没个停。

By and by, as she sat so still, she heard tap, tap, tap, and rustle, whisper, rustle, all up and down the window pane, and on the door, and at the key-hole.

渐渐地，当她在那儿一动不动地坐着的时候，她听到那些"嗒、嗒、嗒"，"沙沙——嘘嘘……嘘嘘……"的声音，在窗棂上面上上下下，在门外，和钥匙孔里面一直不停地传来。

CDC Although only three years old, many in the EU institutions can only be regarded as a latecomer, but the creation of CDC, and put forward the idea of the final completed, the green light not only all the way, but are going fast lane with only 10 months to go, this is unique in the history of the European Union, we can see that the European Union all levels to strengthen disease prevention and control provided by the high degree of attention.

疾控中心虽说仅有3年历史，在众多的欧盟机构中只能算是一个后来者，但疾控中心整个创建过程，从提出设想到最后建成，不仅一路绿灯，而且走得都是快车道，只用了10个月的时间，这在欧盟的历史上绝无仅有，可见欧盟上上下下对加强疾病防控所给予的高度重视。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。