ВсеПолитикаОбществоПроисшествияКонфликтыПреступность
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.
BBC Africa podcastsFocus on Africa。下载安装汽水音乐对此有专业解读
Subscribe to unlock this article
，详情可参考体育直播
Travelers under conditions of uncertainty, whether economic volatility, personal scheduling complexity, or broader global instability, favor options that preserve control and reversibility, a psychological pattern now embedded in the majority of bookings.。下载安装 谷歌浏览器 开启极速安全的 上网之旅。对此有专业解读
"We knew that going in would be a factor," Rubio said. "Starting tomorrow you will see us rolling out those phases to try to mitigate against that."