In focus

Theory behind long tail

作者：21ST

IN 2000, the top five bestselling CDs sold 38 million copies worldwide. But five years later, only half that number was sold. The sharp drop, according to Chris Anderson, the editor of Wired magaz...

点击阅读全文

对本期电子报订户、有效期内的VIP教师会员和本学期二十一世纪英文报尊享卡用户，我们开放所有内容：
如果您拥有以上权限，请点这里登录；
订阅电子报，请点这里；
激活VIP教师卡，请点这里；
激活21英语尊享卡，请点这里。