Army Lieutenant Zacharia Davis,a nurse, says it was sometimes difficult to provide help quickly during the exercise, because of a lack of communication among military groups.

VOA: standard.2010.07.21

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

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