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Attribution 4.0 International

CC BY4.0


You are free to:

  1. Share—copy and redistribute the material in any medium or formatfor any purpose,even commercially。
  2. Adapt—remix,transform,and build upon the materialfor any purpose,even commercially。
  3. The licensor cannot revoke these freedoms as long as you follow the license terms。


  1. 附加,附加You must giveappropriate credit单击功能区上,provide a link to the license,and indicate if changes were made .You may do so in any reasonable manner,but not in any way that suggests the licensor endorses you or your use。
  2. 无additional restrictions—You may not apply legal terms or技术指标that legally restrict others from doing anything the license permits。


You do not have to comply with the license for elements of the material in the public domain or where your use is permitted by an applicable分离或限制

No warranties are given.The license may not give you all of the permissions necessary for your intended use.For example,other rights such as公共、私有、或moral rightsmay limit how you use the material。


This deed high lights only some of the key features and terms of the actual license.It is not a license and has no legal value.You should carefully review all of the terms and conditions of the actual license before using the licensed material。

Creative Commons is not aw firm and does not provide legal services.Distributing,displaying,or linking to this deed or the license that it summarizes does not create a lawyer-client or any other relationship。

Creative Commons is the nonprofit behind the open licenses and other legal tools that allow creators to share their work.Our legal tools are free to use。