为了能够可靠地执行这个任务，发送方需要在一个单独事务中发送消息以及更新它的传输纪录。

To carry this task out reliably, the sender needs to send the message and update its record of the transmission in a single transaction.

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另一方面，使用 CA 颁发的证书需要单独的机制来执行撤销证书和撤销权限这两项任务。

On the other hand, the use of CA-issued certificates requires separate mechanisms for the tasks of revoking certificates and revoking privileges.

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自动过程在单独的、批处理模式(headless)的Application Developer Ant会话中周期性地运行和执行下列任务。

The automation process periodically runs and performs the following tasks within a single, batch-mode (headless) Application Developer Ant session.

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