Streams 中的这些订单都是非异常订单（或直接处理订单）。

These orders in Streams are non-exception orders (or straight-through-processing orders).

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这个过程中也可能有例外情况出现，例如处理无效订单、解决系统异常，以及其它的问题。

There might be exceptions to this normal processing such as the handling of invalid orders, dealing with system exceptions, and other issues.

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这需要人工解决，例如允许处理无效的订单，以及由系统管理员来解决工作流程中的系统异常问题。

This requires human involvement with varying roles, such as approvers to handle invalid orders and system administrators to deal with system exceptions in the workflow process.

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