圖片來源：
http://www.flickr.com/photos/50246687@N00/371755810/
http://www.flickr.com/photos/60731293@N00/2117326761/
http://www.flickr.com/photos/delay36/2285522029/
http://www.desert.org.cn/bbs/attachment.php?attachmentid=242&d=1155612809
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