当借书期限一到，此书将自动终止借阅服务，并自动还回电子图书馆以供其他用户借阅。
When the loan period is up, the book will 15)expire automatically and return itself to thee-library for other 16)patrons to enjoy.
当借书期限一到，此书将自动终止借阅服务，并自动还回电子图书馆以供其他用户借阅。
When the loan period is up, the book will 15)expire automatically and return itself to thee-library for other 16)patrons to enjoy.
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