The first F-35B short takeoff/vertical landing stealth fighter operates in vertical-landing mode on a special "hover pit" at Lockheed Martin in Fort Worth, Texas, during an April test.
4月，洛克希德·马丁公司沃斯堡工厂的“悬停坑”对首架短距/垂直起降F-35B隐形战斗机的垂直着陆方式进行测试试验。
The U.S. Army is short of meeting its annual requirement to train helicopter pilots by about 300, says Gen. Martin Dempsey, who oversees the service’s Training and Doctrine Command.
据美军负责监督服务训练和纪律指挥部的MartinDempsey将军说，美军在其年度要求的直升机飞行员训练中还缺少约300名。
A short time later, Martin Luther King's first book was published, and he made public appearances across the country.
不久后，马丁·路德·金的第一本书出版了，他开始在全国公开的露面。
Martin gathered together a number of carbon copies of his short stories, hesitated a moment, then added his "Sea Lyrics."
马丁选了他几个短篇小说的复写本，犹豫了一会儿，又加上了他的《海上抒情诗》。
This paper describes a short, high-performance cryogenic upper stage designed by Martin Marietta for optimum performance when launched with an attached payload by an NSTS 65K Orbiter.
本文较详细地介绍了美国马丁·玛丽埃塔公司最近研究设计的一种低温上面级的布局、结构和性能。
This paper describes a short, high-performance cryogenic upper stage designed by Martin Marietta for optimum performance when launched with an attached payload by an NSTS 65K Orbiter.
本文较详细地介绍了美国马丁·玛丽埃塔公司最近研究设计的一种低温上面级的布局、结构和性能。
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