This model not only provides an effective means of reserving computer systems, but the model also provides the ability to maintain a checkout history for each user and computer system.
此模型不仅提供保留计算机系统的有效方式，而且还提供了维护每个用户和计算机系统的历史记录的功能。
SAGE is unique in that it can function as an integrator of other diverse computer algebra systems, allowing the user to leverage the individual strengths of the various packages.
SAGE的独特之处在于，它能够用作其他各种计算机代数系统的集成器，从而允许用户利用不同软件包的各自强项。
There is no central user registry that would support single sign-on for computer systems across the campus.
没有支持整个大学计算机系统单点登录的中央用户注册表。
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