This layer is called Software-as-a-Service (SaaS), and it is the model of deploying software from a centralized system to run on a local computer (or remotely from the cloud).

这一层被称作Soft ware - as - a - Service (SaaS)，它是从一个集中的系统部署软件，使之在一台本地计算机上(或从云中远程地)运行的一个模型。

youdao

We are used to this concept as it applies to individual users on a system, but it is slightly different for a SaaS environment.

我们已经习惯这种概念，因为它应用于系统中的各个用户，但是与SaaS环境仍然有些细微的差别。

youdao

After signing up, however, 42% said that there were high and often unexpected costs to SaaS, making it the number one reason they rejected it.

然而在使用后，42%的受访者称SaaS的成本过高，且经常冒出突如其来的成本，这一点便是用户不接受SaaS的头号原因。

youdao

Cirne plans to use the money over the next 18 months to establish New Relic as the undisputed leader in the SaaS IT performance monitoring segment.

FORBES: New Relic Up-Ends Tradition

The next step, though, is something that no SaaS vendors offers and it shows the power of adding open source to the SaaS model.

FORBES: A New Open-Source Model For SaaS

When IT is involved, SaaS applications each then require attention.

FORBES: The Coming Crisis of IT Management