There were 15 minutes between the first air raid alert and the sounding of the all-clear signal.

从第一个空袭警报到警报解除号音其间有15分钟。

《柯林斯英汉双解大词典》

First air, and then a white dye, are injected, and the ct scanner used again to look for detailed evidence of heart disease.

首先注入空气然后是荧光增白剂，再使用CT扫描仪来搜寻心脏病的详尽证据。

youdao

Users won't have to seek out AIR to enjoy its bene-fits; they'll be prompted to download it along with the first AIR applications they want to use.

用户不必搜出air就能享受其好处；用户会得到提示，AIR随同用户想用的第一个AIR应用软件一起下载。

youdao

In addition,the U.S.Air Force conducted its first airdrop of supplies on Monday, north of Port-au-Prince, using an aircraft that flew from the United States and returned there after the drop, easing pressure on the Port-au-Prince airport.

VOA: standard.2010.01.19

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

He began to turn over in the air when his chute opened, and there were problems with the lines at first.

VOA: special.2009.11.24

Its first air and soil tests showed strong traces of methane, a compound usually produced by living things.

NEWYORKER: The Martian Chroniclers

The first Air France Foundation prize will be presented to Dr Xavier Emmanuelli.

UNESCO: MEDIA SERVICES

As for me, after two and a half years of living here, I have ordered my first air purifier.

BBC: Beijing smog: When growth trumps life in China