These system contracts define the qualities of service that a resource adapter provides for transaction management, connection management, and security (Figure 1).

这些系统契约定义资源适配器为事务管理、连接管理和安全提供的服务质量(图1)。

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These system contracts define the qualities of service that a resource adapter provides for transaction management, connection management, and security (see Figure 1).

这些系统契约定义了资源适配器为事务管理、连接管理及安全提供的服务的质量(参见图1)。

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Distributed applications typically use middleware servers to leverage the system services such as transaction, security, and pooling.

典型的分布式应用会通过中间件服务器调用一些系统服务，例如事务、安全以及缓冲池等。

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