It takes twice as much effort to breathe during sleep because of greater resistance to airflow in the airways and changes in the efficiency of the muscles used for breathing.

由于睡眠时呼吸道中的气流阻力更大，并且用于呼吸的肌肉效率有变化，所以在睡眠时呼吸需要用两倍的力气。

youdao

Binder and Wiesel used their consulting backgrounds and business savvy to start Pet Airways in 2005.

宾德和威斯尔在2005年利用他们从事咨询业的背景和他们的商业头脑开创了宠物航班。

youdao

Officials in Cameroon say all114 people aboard the Kenya Airways jet that crashed in Cameroon Saturday are dead.

喀麦隆官员说，星期六在喀麦隆坠毁的肯尼亚航空公司客机上的114人全部遇难。

youdao

During times when Arick's asthma was really severe, he was also given steroids to help reduce swelling in his airways.

VOA: special.2009.07.28

Everyone survived the water landing of a US Airways jet on the Hudson River in New York in January.

VOA: special.2009.06.13

On January 15th, the engines of a US Airways plane lost power shortly after takeoff from LaGuardia Airport in New York City.

VOA: special.2009.01.30

As yet, no operators have taken advantage of the new rules, although the UAE's Etihad Airways is in talks to buy a stake in Jet Airways.

BBC: AirAsia and Tata plan Indian budget carrier

However, an assessment by the European Commission found there has been a significant increase in British Airways fares on the Glasgow route since BMI withdrew early in 2011.

BBC: A Virgin Atlantic plane landing at Heathrow

Let's hope Mr. Parker's American will continue American's new extra-legroom strategy and deploy it in US Airways aircraft.

WSJ: AMR Deal Offers Air Travelers Hope for Better Service