backward flow 逆流 ; 回流 ; 反向流程 ; 对流
backward flow theory 后向血流学说
backward flow process [机] 反流法
backward flow problem 反向流问题
backward-flow 后向流
backward flow interface centrifugation 逆向界面离心
So, in a nutshell, Spring Web Flow makes developing Web applications with directed navigation (typically forward and backward) a lot easier and less error-prone.
所以，概括而言，在使用定向导航（通常为向前和向后）开发 Web 应用程序时，使用 Spring Web Flow 可以使这项工作变得更容易，错误的机率更少。
Instead, business users usually draw backward connections that direct a flow back to an activity further upstream as it is shown in the lower half of the figure.
业务用户通常绘制逆向连接来将流引回上游活动，如此图的下半部分所示。
Backward, flow backward, o tide of the years!
噢，岁月的潮汐，后退，向后退！ ！
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