波音公司还进行了大量的飞行试验计划，以验证系统的设计与开发。
Boeing also performed an extensive flight-test program to validate the system's design and development.
序列图以可视方式为系统中逻辑的流程建模，能够让您记载和验证逻辑，这通常用于分析和设计目的。
Sequence diagrams model the flow of logic within your system in a visual manner, enabling you to both document and validate your logic, and are commonly used for both analysis and design purposes.
迭代开发就意味着在每次迭代的最后，系统就可以工作，从而系统行为、架构和设计的规格就可以得到验证。
Iterative development means that the specifications for behavior, architecture, and design are reviewed in the light of what actually worked on the last iteration.
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