其中一项重头工作就是改善军用医疗直升机的承载能力。
One of his priorities has been to improve the military's medevac capabilities.
周日早上，一架医疗直升机在华盛顿一远郊公园坠毁，造成四人死亡。
Four people are dead after a medical helicopter crashed in a suburban Washington park early Sunday.
他说医疗人员通过直升机进入重灾区进行营救，但是该地区的交通通信受到破坏，救援行动难以进行。
He said medical personnel were on their way to the worst-hit areas in helicopters but rescue efforts have been hampered by disruption to communications in the region.
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