传输之后，使用那个结构中的数据来将字符串自身复制到本地存储的缓存区内，方法是借助另一个dma传输并等待它完成。

After the transfer, you use the data in that structure to copy the string itself into your buffer in the local store using another DMA transfer, and wait for it to complete.

youdao

这是之前的rdb无法做到的，rdb一般是通过将XML数据放进特定的表结构中来存储XML数据，而且只是简单地将数据作为大型字符串来处理。

This is in contrast to previous RDBs, which usually stored XML data by fitting it into a specified table structure, and simply handling the data as a large character string.

youdao

可以用来存储字符串，哈希结构，链表，集合，因此，常用来提供数据结构服务。 通常也叫做结构化非关系型数据库。

It is often referred to as a data structure server since keys can contain strings, hashes, lists, sets, sorted sets, bitmaps and hyperloglogs.

youdao