DB 2这样做是为了优化备份实用程序的性能(我们假设备份要多于恢复)。
DB2 does this to optimize the performance of the backup utility (we assume you are performing more backups than restores).
通过膜污染物类型的判断、清洗剂的正确使用以及设备装置的适当调整，使清洗后的设备性能基本恢复。
Through analyzing the type of pollutants, right application of the cleaning reagents and proper adjustment of the equipment, the performance of the cleaned equipment can, in principle, be restored.
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