We will be on the air in five minutes.

我们将在五分钟后开始广播。

youdao

The fight will be televised free to air on the Fox Network.

这场对决将在福克斯电视网免费播出。

《柯林斯英汉双解大词典》

If you don't study hard from now on, your ambition to enter Tsinghua University will be just a castle in the air.

如果你不从现在开始就努力学习，你考进清华大学的抱负就是异想天开。

youdao

And,the air traffic control tower suggests a minaret that can be found on a mosque.

VOA: special.2011.04.01

The researchers suspect that the newborn c-section babies might be picking up their generic bacteria mix from the air - one way bacteria gets on our skin.

VOA: standard.2010.06.30

That force is scheduled to be reduced from nearly by next October,and to zero by the end of 2011, although Secretary Gates said Friday there could be a follow-on agreement for some U.S.troops to stay, particularly elements of the Air Force.

VOA: standard.2009.12.12

But the folks who are actually going to be on the air for another hour weren't able to give the move a ringing endorsement.

FORBES: What Is Today's Future?

Anyone who can bring enlightenment, passion, information, wisdom, wit and compassion together in such a compelling package deserves to be on the air as often and as long as possible.

FORBES: Keith Olbermann Casts A Wide Net In Job Search

They do suggest that David Cameron is right to be piling on the air miles in Asia this week.

BBC: Re-routing UK trade