Sheila Sisulu from the World Food Program says the project aims to break a cycle that keeps people hungry.

VOA: special.2009.11.17

You couldn't just run something successfully in a cycle and get work out of it, using the heat from the hot reservoir, without also converting some of the heat that came in to heat that would flow into a cold reservoir.

如果一样东西在循环工作过程中,只有热从高温热源中流出，而没有热流入低温热源，那么此过程,不可能对外做功,不可能把所有热。

麻省理工公开课 - 热力学与动力学课程节选

See my friends, go drink, go for a drink, go for a walk, get to the countryside, cycle, I like cycling, I do that.

看朋友，去酒吧，去喝酒，散步，去乡下，骑自行车，我喜欢骑自行车，我就做这些事。

生活费很高 - SpeakingMax英语口语达人

The goal is to stop the cycle of easing rules on banks in good times and tightening them only after a crisis.

VOA: special.2010.09.17

It gets produced in response to a signal so there's a binding of a ligand to a receptor, the enzyme that does this conversion is activated and more cycle AMP is released.

这类分子的产生是对信号做出的一种反应,当配体和受体结合时,催化这种转化过程的酶被激活,更多的cAMP释放出来

耶鲁公开课 - 生物医学工程探索课程节选

The price is four hundred forty dollars compared to one hundred seventy,or less, for a traditional cycle rickshaw.

VOA: special.2009.05.11

So the first step to doing that is I want to just generalize our results so far for a Carnot cycle.

第一步,首先来推广一下,卡诺循环的结果。

麻省理工公开课 - 热力学与动力学课程节选

And so she wants to have a visual representation of life's cycle."

VOA: special.2011.06.15

Each year it's dramatized by the cycle of the seasons, And at a certain time of the year it seems that The forces of darkness and chaos are prevailing but each spring, Once again, cosmic order and life return.

每年这冲突都由季节的轮回戏剧性地体现出来，仿佛是每年都有一个时期,弥散着黑暗和混乱的势力，可是每当春天来临，宇庙的秩序又恢复了。

耶鲁公开课 - 旧约导论课程节选

Her mother was a teenage mother, as well as her grandmother, so you can see the cycle of teen pregnancy,"

VOA: standard.2009.12.04

They start on Thursday and go through a Monday cycle.

从周四开始到下周一是一个循环

耶鲁公开课 - 聆听音乐课程节选

If properly managed, clearing and replanting trees in a 30-year cycle creates both a renewable source of energy and maximum rubber production.

VOA: standard.2009.09.13

So that's a virtuous cycle.

所以是个良性循环。

哈佛公开课 - 幸福课课程节选

Interrupting that cycle was a primary goal of President Obama's massive economic-stimulus package, which he championed almost immediately upon entering the White House.

VOA: standard.2009.07.02

So we're going to go through a thermodynamic cycle, and here's what I want to calculate when we do this.

那么我们要推导,一个热力学循环,这是这个过程中我要计算的东西。

麻省理工公开课 - 热力学与动力学课程节选

The International Organization for Migration says most of Iraq's more than 1.5 million internally displaced people are caught in a vicious cycle of despair.

VOA: standard.2009.10.04

So this is the picture, and this is a cycle that undertakes it.

这是图像，是由这个循环开始的。

麻省理工公开课 - 热力学与动力学课程节选

"There is a need to break the on-again-off-again cycle of our military-to-military relationship,".

VOA: standard.2009.10.27

This is a life cycle of a particular class of viruses called retroviruses.

这里是称为逆转录病毒的一种特殊病毒的,生命周期

耶鲁公开课 - 生物医学工程探索课程节选

He called on a new generation of Africans to build democracy, create opportunity,fight corruption, and end the long cycle of strongman rule and conflict on the continent.

VOA: standard.2009.07.11

If cells were actively proliferating, that is you had a population of cells that are actively proliferating, they would be going through continuous rounds of the cell cycle.

如果细胞处在活跃增殖状态,就是说有一定数量的,细胞具有增殖活性,它们就会连续地经历细胞周期的各个阶段

耶鲁公开课 - 生物医学工程探索课程节选

Skeptics say global warming is part of a natural cycle of climate change.

VOA: standard.2009.12.09

Of course there are lots of ways we can execute the cycle, but this is a simple one, and these are steps that we're all familiar with at this point.

当然循环过程,可以有很多种方法，这是一个简单的例子，这是循环过程,循环中的每一步我们都很熟悉。

麻省理工公开课 - 热力学与动力学课程节选

The number of these attacks and the resulting casualties remained at the 2004 levels though, and as of yet have not rekindled a cycle of ethno-sectarian type violence,".

VOA: standard.2009.03.31

If we build an engine for a car or anything else, it almost always is going to have some key element that's operating in a cycle, otherwise it won't keep going, right.

如果我们为一辆汽车，或其他什么东西制造一台引擎,它总要有一些关键，要素来形成循环。

麻省理工公开课 - 热力学与动力学课程节选

"We have had depressions," "We have had recessions. It is a boom and bust cycle that we are having and people are starting to get fed up with it."

VOA: standard.2009.03.29

And I wanted to do it a different way which is a little bit convoluted, but it introduces the idea of a thermodynamic cycle, and it's something that we're going to use a lot in the class.

现在我将用另一种,有些复杂的办法来推导这一关系，在这一过程中引入,我们今后会常接触到的,热力学循环的概念。

麻省理工公开课 - 热力学与动力学课程节选

The independent group certifies products and services as environmentally friendly through a life-cycle evaluation - looking at the raw materials and the manufacturing process, transportation and recycling of old products.

VOA: standard.2009.03.30

It's not a result that's specific to the one cycle that we put up.

这不是某一个,特定热机的结果。

麻省理工公开课 - 热力学与动力学课程节选

Well, then you could imagine a cycle here where activation of the receptor is leading to production of more ligand, is leading to activation of the receptor and production of a ligand.

那么,你就能画出一个循环图,激活受体能导致,更多配体的生成,这些配体又会刺激受体生成更多配体

耶鲁公开课 - 生物医学工程探索课程节选