Also, the effectiveness of such watch lists is being called into question, as the man charged with trying to bring down flight 253 on Christmas Day was not on the U. S. 'no fly' list.

同样，有人质疑这类监测名单是否有用，因为这个被控试图在圣诞节炸毁253航班的男子不在美国的“禁飞”名单上。

youdao

A scramjet is a type of jet engine that USES compressed air in place of conventional turbines to create thrust. Read "U." S. Developing Jets that Fly Five Times the Speed of Sound.

超音速燃烧冲压喷气发动机是利用压缩空气替代常用的涡轮，形成推力的一种喷气发动机。

youdao

AirTran's "AirTran u" program, which allows 18-to-24-year-olds to fly standby for a discounted fare, has its own Facebook page.

穿越航空的“AirTran U”项目让18到24岁的人们享受折扣机票优惠，并开通了相应的Facebook页面。

youdao

The F-35 will be used by the U.S.Air Force and also by the Navy to fly off of aircraft carriers.

VOA: standard.2009.07.21

Now,the U.S.government is changing the rules to require airlines to check the no-fly list within two hours after being notified of changes.

VOA: standard.2010.05.06

U.S.officials plan for the shuttle to fly its last mission in September 2010.

VOA: standard.2009.11.30

It has also worked out contracts with Uncle Sam to fly U.S. employees in from Dubai.

FORBES: Lord of the Skies

More than 600 million people fly U.S. airlines each year, figures show.

CNN: Senate approves plan to end FAA furloughs

Russia insisted Tito's mission was safe and said he would fly despite U.S. objections.

CNN: Russia 'plans more space tourism'