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在动力推进器领域,高技术性能已经不是惟一的追求。最近15年以来的研究努力主要集中在如何设计出清洁、简单和经济的喷气发动机。
In the field of power propulsion, high-tech performance is not the only pursuit. Research efforts in the last 15 years have mainly focused on designing clean, simple, and economical jet engines.