This is a pretty basic set of widgets, and a far cry from the variety of widgets you get with commercial systems, but it's enough for demonstration purposes.
这是非常基本的一组小部件，与商业系统中多种多样的小部件区别很大，但能够满足演示的目的。
2
Most popular open source solutions are extremely well documented and a variety of free and commercial technical support options are available.
很多流行的开源解决项目都有绝佳的文档以及一大票免费和商业的支持选择可以找到。
3
The scientists analysed a variety of commercial beers both before and after storage.