This means that people can copy, modify, distribute and perform the work - even for commercial purposes, without asking permission.

任何人不具有所有权，意味着这些作品可以被自由地复制，修改，分发和演出——甚至用于商业目的。

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You can even modify the software you get under the GPL, and distribute the new version, as long as you share your changes under the same terms (the GPL) that you received the software under.

你可以依据GPL修改这些软件，并分发出新的版本。 一旦你在这些许可协议下分享了这些软件，你就接受了这个协议。

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Licensing was made to protect the developers and software, and at the same time allow other developers to freely distribute and modify the source code.

Licensing被发放，用以保护开发者和软件版权，同一时间，允许其他开发者自由分发和修改源代码。

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Protei is unmanned, autonomous, relatively inexpensive and open hardware (anybody can use, modify and distribute its designs), making it a potentially powerful weapon in the battle to clean up the Gulf of Mexico while preserving the safety of the workers who would otherwise be exposed to the toxic mess.

CNN: Robotic sailboats built to clean up oil spills