backn.后面；背脊；靠背；后背；后卫vt.支持；后退adv.向后地adj.向后的；后面的；偏远的；过时的；积欠的backdooradj.秘密的；偷偷摸摸的

1. Protecting the contents of an area of memory by writing to a backing store.
   通过写入后备存储器对存储器的内容的保护。