be free of和be free to的区别？！

be free of 的意思是“远离……”“免于……”
be free to的意思是“自由去做”“任意……”
Our students are usually free to use the platform on which they are most comfortable; most have at least one computer, and many have more.
我们的学生通常可以自由地选择他们使用最舒适的平台，大多数至少有一台计算机，且许多人有更多台。
Some GUI distributions have licenses that allow them to be used, even in commercial products, free of charge.
一些 GUI 分发版具有允许免费使用的许可证，甚至在一些商业产品中也是如此。

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