To select the right level of abstraction is a key service modeling issue.
选择正确的抽象级别是服务建模的一个关键问题。
Management is the key to loose coupling-the core architectural principle behind the service abstraction.
管理是松耦合问题的关键，而松耦合是服务抽象的核心架构原则。
Management is the key to loose coupling-the core architectural principle behind the service abstraction.
管理是松耦合问题的关键，而松耦合是服务抽象的核心架构原则。
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