Should the high water mark be reached the user can easily increase the threshold by ordering a new license key, further software installation is not required.
如果高水位达到用户可以轻松提高门槛，命令一个新的许可证密钥，再安装软件并不是必需的。
The key criteria is a programing language or an operating system or a software license.
他们把程序语言或操作系统或软件许可协议当成关键条件。
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