求翻译：目前， 美高超音速巡航导弹计划已进入工程研制阶段，海军，空军。国防高级研究计划局等均在推进多项研究新计划，重点目标是研制速度6-8马赫，射程达6000q千米左右的高超音速巡航导弹。同时，以高超音速飞机，吸气式航天运载器为应用背景的高超音速系列飞行试验也在加紧进行中是什么意思？

Currently, the U.S. hypersonic cruise missile program has entered the project development phase, the Navy, the Air Force. Defense Advanced Research Projects Agency to promote a number of studies are on the new plan, key objectives is to develop speed of Mach 6-8, with a range of 6000q km or so of hi

At present, the US high supersonic cruise missile program has been in engineering research and development phase, the navy and the Air Force. Defense Advanced Research Projects Agency, such as many of the studies are in progress, with a focus on new program objective is to develop speed, with a rang

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At present, the engineering development stage us Hypersonic cruise missile plan, the Navy, the air force. Defense Advanced research projects Agency in advancing a number of studies, such as the new scheme, focusing on target development speed is Mach 6-8, a range of about 6000q km of hypersonic crui

At present, have already entered the project to develop stage in program of guided missiles of cruising of the American hypersonic speed, the navy, air force. Defence Advanced Research Projects Agency,etc. is advancing the new plan of many items of research, the key goal is to develop the speed 6-8