You still need to know all about speed, performance, HA technology, application platform, network, etc. But that is not the definition of scalability.

不要误会，您当然需要了解关于速度，性能，可用性，应用平台，网络等相关的一切，但这并非可扩展性的定义。

youdao

It gives applications access to the network status of the client platform as well as its connectivity to remote resources; it also notifies an implementing application of a change in network state.

它使应用程序能够访问客户机平台的网络状态以及与远端资源的连接性；它也可以将网络状态的变化通知给实现中的应用程序。

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First, it is built on a web platform which means that only a relatively modern browser and network connection is required to use the application.

首先，它是基于网络平台的，这意味者使用者只需一个浏览器(浏览器当然不能太老)和网络连接就可以使用这款应用。

youdao

The system provides a platform for continuous network improvement through the application of new and enhanced software development.

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Email will look like another siloed application, less useful than products that sit on the network platform.

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