If a reply activity is skipped the request remains open until the process completes, and an error is returned to the caller.
如果跳过应答活动，则请求在流程完成之前仍保持开启状态，并向调用方返回错误。
Unfortunately we are unable to process your request at this time. This error is usually temporary. Please try again later.
不幸地我们不能够在这次处理你的请求。这一个错误通常是暂时的。请稍后再次试。
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