During uploading, the continuing decrease in speed of a long-playing video was significant.
在上载过程中，长时间播放的视频的速度的持续下降是很明显的。
2
Columbia Records introduced the first successful microgroove long-playing phonographs way back in June 1948.
早在1948年的6月，哥伦比亚唱片公司就成功引进了第一张可供留声机长时间播放的密纹唱片。
3
Within a few months, the first book, the long-playing record and the second radio series were to turn Hitchhiker's into a mainstream hit and make him a household name.