常用的数据存储方法是数组，它很容易被一分为二的，但是合并两个数组则需要把两部分都拷贝到一个新的数组中（对内存有很大的要求）。

One common means of storing data, called an array, is very easy to split in two; but combining two arrays requires copying the contents of both into a new array.

youdao

已经建立发布与订阅(合并拷贝)地两台数据库服务器怎么样运用SQL语句进行备份与恢复数据库？

Publishing and subscription has been established (merged copy) to use two database servers like SQL statements how to back up and restore the database?

youdao

创建一个拷贝和合并两个对象。

Creating a copy and merging two objects.

youdao