The aircraft is a collaborative effort between the U.S. Air Force Research Laboratory, the Defense Advanced Research Projects Agency, Boeing and Pratt &Whitney Rocketdyne.
这架飞机是美国空军研究实验室，美国国防部，波音公司和普惠洛克达因公司的共同研究成果
Pratt &Whitney is exploring putting a gearbox between the fan and the turbine, because fans run more efficiently at low speeds and turbines operate better at high speeds.
而普拉特&惠特尼则正在尝试在风扇和涡轮之间加入一个变速箱，因为风扇低速运转更高效，而涡轮机高速运转则更高效。
Pratt & Whitney is exploring putting a gearbox between the fan and the turbine, because fans run more efficiently at low speeds and turbines operate better at high speeds.
Pratt&Whitney在探索将一个变速箱放在风扇和涡轮机中间，因为风扇在低速时效率较高，而涡轮机则在高速时更高效。
Just in recent days, household names like AT&T Inc. , DuPont, JPMorgan Chase &Co. , as well as jet engine maker Pratt &Whitney, and mining company Freeport-McMoRan Copper &Gold Inc. announced layoffs.
就在最近，那些家喻户晓的公司，如美国电话电报公司，杜邦公司，摩根大通公司，还有喷气发动机制造商普拉特惠特尼公司，以及矿业公司美国自由港麦克米伦铜金公司，都宣布了裁员。
The trip was to inspect and get familiarization with the machinery being produced by Pratt &Whitney.
监造新枪厂的机器生产并熟悉机器操作程序。
The trip was to inspect and get familiarization with the machinery being produced by Pratt &Whitney.
监造新枪厂的机器生产并熟悉机器操作程序。
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