Data migration, that is migrating data from one data environment to another environment, is often did during application software and data base development.
在应用软件及数据库开发中经常要做数据迁移工作，数据迁移就是将数据从一种数据环境移入另一种数据环境中。
Sedimentary environment and its evolution, distribution of sedimentary facies and sand bodies are discussed on the base of the data of log, drilling and c, o isotope.
本文利用测井、钻井和C、O同位素等资料，研究了核二段各砂组沉积时期的沉积环境、相带分布、砂体展布以及沉积演化规律。
Saving data in JFFS2 file system runs simply, which is more suitable to embedded environment compared with traditional data-base.
JFFS2文件系统保存数据简单快捷，占用空间少，跟传统的数据库相比更适应于嵌入式环境。
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