free of charge

基本解释

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。
At present, if a man needs such help and is poor and alone, the state will provide assistance at home free of charge; if he has a little money, he must pay for it all himself.
现在，如果一个人需要这样的帮助，并且他是贫困和单身的，国家将会为他提供免费的家庭救助；如果他是一个小资，他必须自己支付所有的钱。
Both these tools are free of charge and simple to install, and you can find links in the Resources section.
这些工具都是免费的，并且安装简单，您可以在参考资料一节找到相关链接。

Question Box is a service that provides answers free of charge for people who cannot search the Internet directly.
We, in fact, borrow oxygen or steal oxygen from the air free of charge.
我们事实上免费从空气中,借或者偷氧气。
麻省理工公开课 - 固态化学导论课程节选
where we could have dinner and it was free of charge, that kind of thing.
我们可以在那里吃晚餐，而且完全免费，诸如此类的。
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Early commercial users had to honor the peering protocol, swapping data free of charge.
FORBES: Backbone Bullies