Melkert said blackouts continue to persist nationally on average about nine hours a day.

VOA: standard.2010.08.04

Now the nice thing about this is that the degradation mechanisms seem to persist for some period of time, beyond the time at which you deliver the double stranded RNA; whereas, obviously, this mechanism here is only going to exist for as long as the anti-sense sequence is present.

而好消息是降解过程会持续一段时间,比你转入双链RNA的时间要长,但是,这种机制只会在,有反义链的时候发挥作用

耶鲁公开课 - 生物医学工程探索课程节选

And I think many parents believe that if they didn't persist in using these things their children would never learn to speak.

我相信很多父母认为,如果他们不坚持使用这些东西,他们的孩子将永远也学不会说话

耶鲁公开课 - 心理学导论课程节选

The Iraqi people,he insists, will persist and overcome these attacks, and raise its voice to show proclaim that it will not be silenced .

VOA: standard.2009.08.29

We're trying to understand exactly what changes in your brain when you learn and how those changes persist over time to support memory. And one thing that we know which helps explain why some things are easier to remember than other is that learning is not a unitary process.

我们一直都想查明，学习的时候，大脑到底发生了什么变化，这些变化是如何长时间控制记忆的,我们都知道，学习的过程不是一元化的,这就是为什么有的东西好记，有的东西难记。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

"If we are to defeat this vicious insurgency and by doing so make Britain and the world a safer place, then we must persist with our operations in Afghanistan.

VOA: standard.2009.07.13

Because of the plot, sweeping security changes were brought into the airline industry, including restrictions on carrying liquids on planes that persist to this day that many passengers just have to cope with.

VOA: standard.2009.09.07