麻省学院的D型“两个泡泡”系列设计概念基于改进过的“管状机身和一对后倾机翼”结构，机身更加宽大，可以提供额外的升力。
MIT’s D “double bubble” series design concept is based on a modified “tube-and-wing” structure that has a very wide fuselage to provide extra lift.
根据一些重要的基础性概念，可以为基于SOA的企业体系结构的服务建立模型，并设计这些服务。
These are some of the essential foundational concepts on which the services in an SOA-based enterprise architecture are modeled and designed.
理想的基于面向服务的体系结构系统设计的需求是在服务消费者与服务提供者之间进行解耦。
An idealized requirement in Service-Oriented Architecture (SOA) -based system design is that of decoupling between service consumers and service providers.
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