暂态电能质量问题越来越突出，如电压跌落、骤升、短时断电等现象经常发生，给用户带来了很大的损失。
Transient power quality issues have been becoming extrusive, such as voltage well, voltage sag and voltage interruption, and bring customers amount of loss.
这种存储器在断电时将丢失其存储内容，故主要用于存储短时间使用的程序。
The memory in case of a power cut will be lost their store content, so it is mainly used for storage short time use process.
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