This is the most important step in the upgrade process!
这是升级过程中最重要的一步!
Since the original 1.5 site is not touched in the upgrade process, you should be able to use if for reference while working on the new 2.5 site.
因为原来的1.5网站不是感动在升级过程中,您应该能够使用如果参考工作时新的2.5站点。
This process will be very similar to the one described in Operating system upgrade as part of a migration, beginning at Step 4.
这一过程与“作为迁移工作的一部分升级操作系统”中描述的过程(从步骤4开始)非常类似。
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