If an unexpected active window appears during the playback of an automated test, where that window was not visible during the recording, the automation script will fail.
Many presentations or lectures fail because they simply attempt to transfer information from speaker to listener as if the listeners were not active participants.
许多演讲和讲座失败的原因是：演讲者仅仅试图把信息传递给观众，而没有把观众当成积极主动的参与者。
3
DB2 Express supports infinite active log for a single transaction, so a long transaction will never fail (provided physical disk space is sufficient).
DB 2 Express支持单个事务的无限多个活动日志，所以长期事务永远不会失败(只要物理磁盘空间足够)。