This image was created by Chris 73. The image is licensed under a dual license; please choose either of the two licenses below as desired. Attribution to Wikipedia or another project of the Wikimedia foundation is required for both licenses if the image is used outside of projects of the Wikimedia foundation. Attribution to me is not required.

已授权您依据自由软件基金会发行的无固定段落及封面封底文字（Invariant Sections, Front-Cover Texts, and Back-Cover Texts）的GNU自由文件许可协议1.3版或任意后续版本的条款，复制、传播和／或修改本文件。该协议的副本请见“GNU Free Documentation License”。 www.gnu.org/licenses/fdl-1.3.htmlGFDL 1.3GNU Free Documentation License 1.3truetrue

本文件采用知识共享署名-相同方式共享 3.0 未本地化版本许可协议授权。

署名: Chris 73 / Wikimedia Commons

您可以自由地：

• 共享 – 复制、发行并传播本作品
• 修改 – 改编作品

惟须遵守下列条件：

• 署名 – 您必须对作品进行署名，提供授权条款的链接，并说明是否对原始内容进行了更改。您可以用任何合理的方式来署名，但不得以任何方式表明许可人认可您或您的使用。
• 相同方式共享 – 如果您再混合、转换或者基于本作品进行创作，您必须以与原先许可协议相同或相兼容的许可协议分发您贡献的作品。

https://creativecommons.org/licenses/by-sa/3.0CC BY-SA 3.0 Creative Commons Attribution-Share Alike 3.0 truetrue

"I want to use the image. How do I do that?"

You can use this image freely for any purpose, including commercial use, provided that you license it under one of the above licenses. My suggestion is to use the following text:

This Wikipedia and Wikimedia Commons image is from the user Chris 73 and is freely available at //commons.wikimedia.org/wiki/File:NautilusCutawayLogarithmicSpiral.jpg under the creative commons cc-by-sa 3.0 license.

For privacy reasons please use only "Chris 73" as author. If necessary, please translate the text in your language. For electronic use please include the links in the text as shown, for printed use please print the text as shown. If you use the image I would appreciate it if you would let me know on my talk page, but this is not required as long as you follow one of the above licenses.