RKK Energia carefully kept the overall mass of the future spacecraft within Zenit's capabilities.
安吉亚太空公司在“天顶号”运载火箭承载能力的范围内小心翼翼地保留了这艘未来飞船的整体质量。
RKK Energia completed its research and development work on the future craft and submitted it to Roskosmos in April of this year.
安吉亚太空公司于今年4月份完成了未来飞船的研发工作，并提交给了俄罗斯太空局。
To make its case, RKK Energia took the unusual step - at a preliminary design stage - of ordering the construction of an experimental propulsion system.
为了证明自己的设计有道理，安吉亚太空公司走了非同寻常的一步：在初步设计阶段，定制建设了试验性的推进系统。
To make its case, RKK Energia took the unusual step - at a preliminary design stage - of ordering the construction of an experimental propulsion system.
为了证明自己的设计有道理，安吉亚太空公司走了非同寻常的一步：在初步设计阶段，定制建设了试验性的推进系统。
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