Sometimes the DJ would move one record while holding the other one down.

VOA: special.2009.10.14

So I just wanted to address that quickly before we move on, and actually address another thing about dealing with wavelengths of particles that sometimes comes up.

在我们继续之前我要先更正一下，实际上是更正有时我们会碰到的,另一个对待粒子波长的问题。

麻省理工公开课 - 化学原理课程节选

They sometimes shout and move with no purpose or goal.

VOA: special.2009.09.15