However, if the virtual appliance provider allows extensions, they must provide techniques to maintain these extensions during update.

不过，如果虚拟设备供应商允许扩展，则必须提供在更新期间维护这些扩展的技术。

youdao

Do any of your virtual directories contain files with unprotected extensions?

您的虚拟目录中是否包含具有不受保护的扩展名的文件？

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A significant new area addressed by this Recommendation is the support of Virtual Private Networks by means of new optional extensions.

本建议所提出的一个重要新领域就是通过新的任选扩展来支持虚拟专用网络。

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And these phones, which have become our constant companions and virtual extensions of our bodies, are increasingly being used to track our physiology from moment to moment.

CNN: Is personalized medicine a myth?

In parallel, define a security architecture and migration strategy that provides security through browsers, Secure Sockets Layer and passwords in the short run, and gets you started on PKI by deploying technologies such as IP Security virtual private networks and the Secure Multi-purpose Internet Mail Extensions e-mail standard.

CNN: Easy-to-use PKI is key to cryptography's success