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BSD-3-Clause是一种开源软件许可协议，也称为BSD三条款许可证。它是BSD许可证家族中的一种，是一种宽松的许可证，允许软件自由使用、修改和重新分发，同时也保留了一些版权和责任方面的规定。
BSD-3-Clause许可证的主要特点包括以下三个条款：
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再分发条款：允许在任何目的下再分发软件的副本，包括商业目的，只要满足以下条件：
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需要保留原始的版权声明和许可声明。
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在广告和其他宣传材料中，需要包含对原始软件的引用。
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免责条款：声明原作者和贡献者不对软件的使用负责，使用软件的风险由用户自行承担。
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修改条款：允许用户修改软件的源代码，但修改后的软件必须以原始软件的许可条件进行再分发。
BSD-3-Clause许可证相对宽松，允许在商业和非商业项目中自由使用和分发软件。与其他开源许可证（如GPL）相比，BSD许可证对于软件的再利用和分发设置了更少的限制。这使得BSD-3-Clause许可证被许多开发者和组织广泛采用。
需要注意的是，尽管BSD-3-Clause许可证允许在闭源软件中使用和分发，但仍需要遵守许可证的规定，包括保留原始版权声明和许可声明。如果你使用了采用BSD-3-Clause许可证的软件，建议仔细阅读许可证的具体条款，以确保你的使用符合许可证规定。
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