1, vigilant
A young man, with vigilant eye, watched every motion of the ship, and repeatedeach direction of the pilot.

有一个青年用他那敏锐的眼光注视着船的每一个动作,并复述领港的命令。 2, clinic: VS. chronic:
The doctor went into the clinic and began to work.

走进诊所,开始看病。 chronic: adj.
New research shows chronic sleep loss cannot be cured that easily.

最新研究表明,长期缺觉没那么容易补回来。
3, burnout:
Will I be able to avoid burnout?
我能够避免身心透支吗?
4, quadruple:
For operators of Predators and Reapers — which fly at 20,000 feet and can kill terrorists with Hellfire missiles or guided bombs — daily combat missions have quadrupled from 10 to 15 in 2007 to 57 today, James says.
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