上上下下的

A bluebottle path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle buzzing round the room; it would be up and down, to and fro and from side to side.

假如我们真能看到诸如岩石中一个沙粒子的运动轨迹，那就像一只嗡嗡叫的绿头苍蝇在屋内飞行的轨迹，呈现出上上下下、来来回回、左左右右3种性质的运动。

If we could actually see the path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle buzzing round the room; it would be up and down, to and fro and from side to side.

假如我们真能看到诸如岩石中一个沙粒分子的运动轨迹，那就像一直嗡嗡叫的绿头苍蝇在屋内飞行的轨迹，呈现出上上下下、来来回回的运动。

If we could actually see the path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle path described by a particle, such as a sand grain in the rock, it would be more like that of a bluebottle buzzing round the room; it would be up and down, to and fro and from side to side.

假如我们真能看到诸如岩石中一个沙粒子的运动轨迹，那就像一只嗡嗡叫的绿头苍蝇在屋内飞行的轨迹，呈现出上上下下、来来回回、左左右右3种性质的运动。

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。

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。

Actually, in a ten thousand changes in the twinkling of an eye, times that cannot predict, we represent the metabolic view that gives 2005 lukewarm states very hard, but the personal topic that our strive finds out remittent collective attention, with draw the outline of roughly outline.

其实，在一个瞬息万变、无法预言的时代，我们很难描绘出2005温州的变化图景，但我们力图找出上上下下共同关注的切身话题，以勾画一个大致的轮廓。

A well-adjusted engine will have a stable idle and will not surge up and down after the throttle is closed.

一个完美的调整引擎将有稳定的怠速，收油门转速会上上下下都是不正确的。

Tragedy often occurs when governments come along in hobnailed boots and trample over these informal systems, as happened in the Sahel during a dreadful drought in the 1970s.

上上下下。悲剧常常发生在政府开始镇压这些非正式的系统的时候，比如1970年代撒赫勒严重的旱灾。

You don't simply look left and right for impending cars. You look up and down, in and around. Your best bet is to find someone else who is making the same attempt at crossing the street. You latch onto them and away you go through the maze of honks and wheels to the other side, to safety.

你不仅要左看右看躲开过往的车辆，而且也要上上下下、里里外外地环顾，为了以防碰撞，其实你最好的方法是找一个也需要横过马路的行人，然后紧随着他穿过混着汽车鸣笛声和滚滚车轮的街道。

She told him from what land she came, and he knew that land; he had been there, but then she was not at home; he had peeped in at the window, above and below--he had seen both the one and the other, and so he could answer the princess, and make insinuations, so that she was quite astonished; he must be the wisest man in the whole world!

她告诉他，她是从哪一个国家来的，而他恰恰知道这个国家--他到那儿去过，但是那时她已经离开了。他曾经从窗口向她宫殿的内部看过--上上下下地看过。他看到了这，也看到了那。因此他可以回答公主的问题，同时暗示一些事情--这使得她非常惊奇。

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。