bit-by-bit memory

基本解释

DB2 10 substantially increases the amount of virtual storage that can be addressed by moving most DB2 working memory from 32-bit to 64-bit.
通过将大部分 DB2 工作内存从 32 位迁移到 64 位，DB2 10 极大地提高了可以寻址的虚拟内存量。
Memory constrained -- The extra memory provided by 64-bit supports a better caching strategy, enabling the application to avoid expensive queries, and so on.
内存限制——64 位所提供的额外内存可以支持更好的缓冲策略，使得应用程序可以避免开销很高的查询，等等。
Their launch strategies involved upgrading their phones bit by bit - a better camera, a brighter screen or larger memory - so as to make the "new" device just a little more attractive.
这些厂家的发布策略包括一点点地升级（好一点的摄像头，一块更明亮的屏幕或是更大的内存），以使这个‘新’设备多一点吸引力。