In the preliminary design stage, the designer emphatically considered the product should have function.
初步设计阶段，设计者着重考虑产品应该具有的功能。
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。
We research the design method about highway ecological landscape from three aspects: the feasibility study report, the preliminary design stage and detailed design stage.
从可行性研究报告、初步设计阶段和详细设计阶段三个方面，研究了高速公路生态景观设计方法。
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