Physicists use super-powerful magnets to speed particles and control radiation like X-rays.

VOA: special.2010.10.08

The beat will do--control--that, so it's the pace or speed of the beat.

节拍才是根本,所以速度指节拍的快慢

耶鲁公开课 - 聆听音乐课程节选

It dove toward Earth at great speed, spinning rapidly out of control.

VOA: special.2010.07.07