1·Since the data federation pattern does not create copies of source data, source changes do not have to be propagated or processed in this approach.
由于数据联合模式并不会创建源数据的副本，因此源更改并不一定要采用这种方法进行传播或处理。
2·Note how all of the exceptions are caught, so that none of them are propagated upward to the call stack.
注意，所有这些异常是如何捕获的，因此它们不会被向上传播到调用堆栈。
3·Such differences include what the token is attached to (thread, subject), in which direction it is propagated (downstream, horizontal), and what it is used for (authentication).
这些区别包括令牌附加的对象(线程、主题)、传播的方向(下游、水平)、以及使用它的目的(身份验证)。
4·Figure 1 illustrates events propagated across layers of an architectural stack.
图1说明了跨架构堆栈各层传播的事件。
5·If only the identity of the middle tier service is propagated to the downstream service, the downstream service does not have proper control over audit and authorization of access to the service.
如果只有中间层服务的标识传播到下游服务，则下游服务不能对服务访问审核和授权进行正确的控制。