The two-stage design theory under planning control gives a good method to decompose the designs.

规划控制下二阶段设计理论提出了一种对设计问题进行规划分解的有效的方法。

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In Code for seismic design of buildings of China, three seismic fortification levels and two-stage design methods are applied.

我国规范采用三水准设防、两阶段设计的方法进行抗震设计。

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When we entered the design stage, however, the necessity of modeling the communication mechanisms between the two systems would likely overburden the single diagram.

然而，当我们进入设计阶段时，两个系统中的通讯机制建模的必要性使得单一的图表过于复杂。

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The firm, established by Amazon entrepreneur Jeff Bezos, has a design for a capsule and two-stage rocket.

BBC: US firms target astronaut flights

The two variants share many design features but use different engines in their third segment, or stage - the part of the Soyuz said to have been responsible for the failure five days ago.

BBC: Soyuz back in service after failed launch

One interesting aspect of the Antares design is its use of two Aerojet AJ-26 engines on its liquid-fuelled first stage.

BBC: Orbital's Antares rocket makes test flight