与良好的描述库相伴而来的优点是能够提供工具来帮助符合产品的开发和验证。
Along with a good description base comes the capability to provide tools that assist in the development and verification of conforming products.
同一服务的两个或更多提供者即使具有完全不同的实现也可以立即识别出来，因为它们的声明性接口符合相同的描述。
Two or more providers of the same service are immediately recognizable, even though they may have very different implementations, because their declarative interfaces fit the same description.
你可能通过是美国公民或永久居民的亲属而符合获得绿卡的条件，或通过下面描述的特殊类别得到绿卡。
You may be eligible to get a green card through a family member who is a U. S. citizen or permanent resident, or through the special categories described below.
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