desige3D手册请教

mipan

在design3D的数据库生成的手册中有说同时计算的，有一段没读懂请教一下论坛上的高手这是什么意思？谢谢啦。
“This concatenation process must be performed  manually by importing all the database files into a single file. Then, the three first lines of the 2nd to the nth databases must be removed. Finally, the number of samples appearing in the third line of the global file must be set to the total number of database samples contained in  the global database. The sample index will be updated during the optimization algorithm.”