大约一半的新引擎项目是在国外开展，同样，一半的研发也是在国外进行的。
About half its new engine projects are based abroad, along with the same proportion of its research and development.
这个正为NASA研发中的“通用可扩展超低温引擎”以液态氧(- 297华氏度)与液态氢(- 423华氏度)的混合物为燃料。
The Common Extensible Cryogenic Engine being developed for NASA burns a mixture of liquid oxygen (-297 degrees Fahrenheit) and liquid hydrogen (-423 degrees).
各大学向他们提供技术支持，尤其是研发昂贵的引擎。
Universities provided technical help, especially in the development of expensive engines.
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