When the front bird moves its wings up and down, the resulting force of the air lifts the next one.

当前面的鸟上下移动它的翅膀时，产生的空气力会带动下一只鸟。

youdao

If the virus had been capable of spreading through the air, or if one infected person had unknowingly entered a large population center, Ebola might have become a worldwide epidemic.

如果这种病毒能够通过空气传播，或者如果一名感染者在不知情的情况下进入了人口密集的地区，那么埃博拉可能已经成为一种全球流行病。

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Hook stood shuddering, one foot in the air.

胡克站在那里，一只脚举在空中，浑身发抖。

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During one week in nineteen forty-eight, poisonous air in a nearby town killed twenty people and sickened six thousand others.

VOA: special.2009.07.13

For every increase of five degrees Celsius in air temperature, the patients had a seven and one-half percent higher risk of migraine.

VOA: special.2009.03.18

Let sanitized cans air-dry for at least one hour before opening or storing them.

VOA: special.2010.07.19

And what we see here -- a multibillion-dollar deal between Lion Air -- one of the fastest-growing airlines not just in the region, but in the world -- and Boeing is going to result in over 100, 000 jobs back in the United States of America, over a long period of time.

WHITEHOUSE: President Obama Speaks on Agreement Between Boeing and Lion Air | The White House

Beneath the two passenger decks of this modified super jumbo is an Air Force One-style air-stair -- allowing access to the tarmac without the need for a sky-bridge or external staircase -- and a crew dining area, crew gallery, crew bathroom, sleeping quarters for eight on bunk beds, a communications room and spiral staircase leading to the main deck.

CNN: Luxury living at 35,000 ft

It's also against Tripoli's rules to aim the rocket at any hard target, for obvious reasons--one man's weekend missile could easily become another man's Air Force One-seeking Stinger.

FORBES: "Let's Punch A Hole In the Sky"