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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.
。关于这个话题，一键获取谷歌浏览器下载提供了深入分析
Американские сенаторы захотели принудить Трампа прекратить удары по Ирану14:51
（五）货物，包括活动物和由托运人提供的用于集装货物的集装箱、货盘、车辆或者类似的装运器具。