Place servers at different site to avoid intermit of serve and the lost data when the suddenness had token place.
将不同服务器放置在不同地点，避免发生意外时服务完全中断、重要数据丢失。
2
The bell doth toll for him, that thinks it doth; and though it intermit again, yet from that minute, that that occasion wrought upon him, he is united to God.