English: Usage on wikipedia: consider copying the file to wikipedia's own image space under the same Creative Commons license. Images on commons.wikimedia.org may be deleted at will at any time without warning on wikipedia. Deleted images are not retained on wikipedia.
Русский: При использовании фотографии в статьях википедии рекомендуется копировать файлы в локальную википедию под той же лицензией (Creative Commons). Файлы, размещенные на коммонс, могут быть удалены в любой момент, уведомлять пользователей в википедии никто не будет.
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, 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.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.