除非预支现金，如能及时付款，无需任何费用。
There is no charge (except for cash advances) if the payment is received promptly.
KDE项目是被自由软件开发社区支持的，对于Linux使用者来说是无需任何费用的。
The entire KDE project is supported by the free software development community and is provided to Linux users at no cost.
每一门课程大约只需要15分钟可以完成，在世界的任何一个只需要有互联网连接的地方旧可以获得，无需任何费用。
Each can be completed in about 15 minutes and is available at no charge to anyone with an Internet connection anywhere in the world.
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