Those companies knew they had a captive audience, so they bought up as many journals as they could. Journal articles aren’t interchangeable commodities like corn or soybeans—if your science supplier starts gouging you, you can’t just switch to a new one. Adding to this lock-in effect, publishing in “high-impact” journals became the key to success in science, which meant if you wanted to move up, your university had to pay up. So, even as the internet made it much cheaper to produce a journal, publishers made it much more expensive to subscribe to one.
Шаляпин назвал главное условие для будущей женыПрохор Шаляпин заявил, что будущая жена должна родить ему детей до свадьбы
。业内人士推荐heLLoword翻译官方下载作为进阶阅读
Мэр города занялась сексом с 16-летним подростком на глазах у своих детей02:00。体育直播对此有专业解读
创投家：在第二个层面——社区，龙虾们交换都是些什么内容呢？
Software engineer