IF Mark Roozen, a personal trainer in Colorado Springs, set his group conditioning classes to music, the playlist could start with "I've Been Working on the Railroad."

如果在科罗拉多州的私人教练马克·卢森让他的教员适应在课堂上的音乐，那么一览表以“我一直在铁路上工作”开头。

youdao

This means that the more subscribers a user is connected with, the larger his playlist.

FORBES: Morning Tech Wrap: Steve Jobs, Samsung, Facebook

When Dylan eventually performed in China, no official even censored his playlist.

FORBES: Why My Book Got Banned in China

From there, Huen mapped various songs onto different positions of the knob, allowing him to control his playlist by moving it -- a simple, manual interface for selecting music.

ENGADGET