为了全电刹车系统原理样机的研制和实验，必须设计相应的全电刹车测试系统。
The test system is necessary in the course of developing the electric braking system.
您必须对主题树进行相应的设计，以使消息流的每个副本可以服务于一个特定的主题或树中特定的部分。
You must design the topic tree such that each copy of the message flow can serve a particular topic or portion of the tree.
只要设计师做出设计决定，他们必须将那些决定归档到相应的细节层次。
So as designers make design decisions, they must file those decisions at the appropriate level of detail.
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