A spokeswoman for the mayor's office, Joanna Dovan,says the Pittsburgh area has been working to improve its air quality.

VOA: special.2009.07.13

Then he flung outward, feet first, with a swish, Kicking his way down through the air to the ground.

然后，纵身一跳，他两脚先伸出去，在空中乱踢乱舞，于是飕的一声，降落到地面。

耶鲁公开课 - 现代诗歌课程节选

I try to come to the park early, you know, get some exercise and get a nice walk and some air.

我尽量早起去公园，去锻炼身体，散步，呼吸新鲜空气。

中央公园的时光 - SpeakingMax英语口语达人

The Department of Agriculture, for example, provides biologists to help study wildlife that could be a danger to air travel.

VOA: special.2009.04.01

What was neat about it is before that time, the predominant species to use for air conditioning or refrigeration was ammonia.

在这之前是很整洁的，之前最主要的用于空调或者冰箱的,物质是氨。

麻省理工公开课 - 固态化学导论课程节选

Critics accused European air transport officials of being slow to react, then overreacting to the possible risk to airplanes.

VOA: special.2010.04.23

I'm hot, compared to the air of the room, or cold if I'm somewhere that's warm.

我相对于室内的空气是热的，或是冷的如果我呆在一个温暖的地方。

麻省理工公开课 - 热力学与动力学课程节选

When melting snow crystals or raindrops fall through very cold air, they freeze to form small particles of ice,called sleet.

VOA: special.2010.01.05

And it's the windows in the firmament that are opened--those waters are allowed to rush in and dissolve that air bubble.

而在天空上有个口,水可以从中涌入，溶解这些气泡。

耶鲁公开课 - 旧约导论课程节选

When melting snow-crystals or raindrops fall through very cold air, they freeze to form small particles of ice, called sleet.

VOA: special.2011.01.11

We're still close enough to the summer that the air is not just filling us up with extra static electricity, so it's a little more challenging here.

我们现在离夏天更近了,这样空气中不总是,充满额外的静电，所以这时做实验,会有一些挑战性。

麻省理工公开课 - 化学原理课程节选

I knew the sky was black because all the heat, which meant light to me, had died out of the air.

VOA: special.2009.11.15

It's got that kind of air of profundity about it that philosophy's thought to have or aspires to have.

带有某种哲学思想或追求,所具有的深刻性。

耶鲁公开课 - 死亡课程节选

This gives them their color. However,when light travels from air to snow, some light is sent back,or reflected.

VOA: special.2010.01.05

And then, suddenly I need to MacBook Air sell my MacBook Air on Craigslist and I can take the person's credit card instead of having them bring $1200 to me or whatever I'm selling it for.

之后突然我需要,在克雷格斯利斯特网站上卖我的,而且我可以让那个人拿信用卡过来,而不是,带着1200美元或是我需要的别的东西给我。

斯坦福公开课 - Twitter之父Jack.Dorsey演讲：好奇和灵感的力量课程节选

Because of the open-air stage, actors had to shout very loudly and make big motions to be heard and seen by all.

VOA: special.2010.01.06

So, I wanna just have a chance to speak with you on the air, on the Inner Core.

因此，我很想有这样一个机会和你们,在演播室，在人性讲堂上谈谈。

普林斯顿公开课 - 人性课程节选

It says the aim is to bring air guitarists out of the house where they secretly perform and onto the world's stage.

VOA: special.2009.08.14

So there were criticisms in the air but obviously he doesn't want to say much about that.

当时的环境充斥着对他的批评,但是他似乎也不愿回应。

耶鲁公开课 - 文学理论导论课程节选

For this reason,he says, air searches would need to be done in areas where the climate is dry or plants lacking altogether.

VOA: special.2009.11.17

This says, if you want to be in the air for a long time, so you may think that 90 degrees is the best angle.

也就是说,如果你想在空中停留更久,你也许会认为 90°是最佳选择

耶鲁公开课 - 基础物理课程节选

Untreated patients can spread the bacteria from their nose and mouth through the air to people who are near them a lot.

VOA: special.2009.10.14

I don't know how well you can make it out but there's a little broom guy there with glasses, playing air guitar with his broom, and I guess this is meant to capture the spirit of the contributors.

我不知道你们能理解到什么程度,但是在那儿有一个戴着眼镜的男孩，用他的扫帚在弹着吉他，我猜这个的寓意是指要抓住那些发起人的精神内涵。

耶鲁公开课 - 现代诗歌课程节选

To play "air guitar" you move to the music as if you are playing an imaginary guitar, maybe like a famous rock musician.

VOA: special.2009.08.14

You do not have to wave your hands in the air if you're math phobic, but since some of you are, let me just get you all to take a deep breath.

如果你有数学恐惧症你不必举手示意,既然有人是,那么让我们深呼吸一下

耶鲁公开课 - 博弈论课程节选

The effort to stand carried me into the Martian air to the height of about one meter.

VOA: special.2010.07.10

He did it to bring more light, he did it to bring more air, he did it to free the flow for capital, money; that's why the department stores are on the boulevards.

他这么做是为了多点光,多点新鲜空气,他为了使资产的流动更为自由,这就是为什么百货商店都建在大道旁边

耶鲁公开课 - 1871年后的法国课程节选

As asthma sufferers struggle to get air into their lungs, they may begin to cough a lot.

VOA: special.2009.07.28

The main goal of the respiratory system is to bring fresh in so that you can extract oxygen from it, and blow used air out so that you can rid of carbon dioxide which is the end product of carbon metabolism inside our bodies.

呼吸系统的主要功能是,吸入新鲜空气,以便获得空气中的氧气,呼出废气,以便排出二氧化碳,二氧化碳是人体内碳代谢的终产物

耶鲁公开课 - 生物医学工程探索课程节选

We usually try to come to the park to get out a little bit, get some air,

我们通常尽量出去，去公园，呼吸新鲜空气，

中央公园的时光 - SpeakingMax英语口语达人