Without it, VB 6 applications that support printing cannot be upgraded to.net.
没有它，VB6应用程序的打印功能就无法升级到。NET。
The original software, however, may well be out of support and in many cases cannot be upgraded to later versions.
然而，其原来的软件可能已经完全得不到支持，在很多情况下不能升级到最新的版本。
Migration of all the existing applications to a new LDAP server cannot be done on a short notice and usually takes time to configure the upgraded applications with a new LDAP server.
将所有现有应用程序迁移到新ldap服务器无法在短期内完成，而且使用新ldap服务器配置升级的应用程序通常需要很长时间。
When testers play back the saved scripts against the upgraded application, playback might return an error that indicates that an object cannot be found.
当测试员根据升级的程序来测试保存的脚本时，回馈可能会返回一个错误，说不能找到对象。
However, because packages cannot be removed, the developers are forced to delete the revision in which the package was installed or upgraded plus all later revisions.
但是，因为包不能被删除掉，所以开发人员不得不删除更改后的版本，这个更改后的版本指的是安装或者更改后的包加上所有后续的更正。
A GPL proponent might argue that a license for free software must be upgraded periodically since we cannot anticipate what new use models for free software might be developed that restrict freedom.
GPL 的鼓吹者也许会辩解说，“自由”软件的协议必须周期性的增加严苛的改进，因为我们不能预料到会产生什么样的限制他们所谓“自由”的使用模式。
A GPL proponent might argue that a license for free software must be upgraded periodically since we cannot anticipate what new use models for free software might be developed that restrict freedom.
GPL 的鼓吹者也许会辩解说，“自由”软件的协议必须周期性的增加严苛的改进，因为我们不能预料到会产生什么样的限制他们所谓“自由”的使用模式。
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