在抽象的最高级别上，我们可以将系统视作一个单个实体(复杂整体)，或黑盒。
At the highest level of abstraction, we can view the system as a single entity (complex whole), or black box.
MDA促使架构师和开发人员在比非mda项目中期望的更高的抽象级别上工作。
MDA encourages architects and developers to work at higher levels of abstraction than typically expected in non-MDA projects.
您应该有能力同时在不同的抽象级别上获得并应用知识，以及通过综合和创造来创建新的概念。
You should be capable of acquiring and applying knowledge at varying levels of abstraction simultaneously as well as creating new concepts through synthesis and invention.
例如，可以在较高的抽象级别上用业务术语来描述一项需求，但是另一项需求则可能需要进行非常详细的技术描述。
For example, a requirement may be described at a high level of abstraction in business terms, but another one can be a very detailed technical description.
由于基本没有进行抽象，在代码级而不是一个更概念化的级别上进行了很多讨论，这就失去了很多复用等的机会。
Since few abstractions are used, a lot of the discussions are made at the code level versus a more conceptual level, which misses many opportunities for reuse, among other things.
该模式允许客户端从一组信息源检索信息，而无需了解(至少在较高的抽象级别上)多个源的存在。
The pattern allows a client to retrieve information from a group of information sources without the need to understand, at least at a high level, that multiple sources exist.
该模式允许客户端从一组信息源检索信息，而无需了解(至少在较高的抽象级别上)多个源的存在。
The pattern allows a client to retrieve information from a group of information sources without the need to understand, at least at a high level, that multiple sources exist.
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