They persist because of the country's high rate of violent crime, as expressed by this Johannesburg resident who did not want to be identified.

VOA: standard.2009.06.12

Cells can stop in their lifetime at some point in the cell cycle and persist for long periods of time.

细胞生命期可以停止在细胞周期的某个点,并保持很长时间

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

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

VOA: standard.2010.08.04

Why did an inhumane institution of course not everybody who defended it thought it was inhumane but why did that system survive, persist and grow?

为什么一个不人道的制度,当然不是所有捍卫它的人都觉得不人道,为什么奴隶制度还是会生根,发芽,成长

耶鲁公开课 - 美国内战与重建课程节选

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

So if you have sons and they are healthy, and they do well, and they have children, that means your name will be carried into the future, your memory will persist and that is one form of immortality.

如果你有儿子,并且他们健康成长,表现良好,然后他们也有了孩子,那就意味着你的名字将会被延续下去,你的记忆将会持续下去,这就是一种形式的永生

耶鲁公开课 - 古希腊历史简介课程节选

"However,despite this widespread support for, and awareness of the rights of the child, there persist severe violations, including violence, sexual abuse and exploitation, child trafficking and forced labor,"

VOA: standard.2009.10.08

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

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

"There will be difficult days ahead." "We will adapt,we will persist, and I have no doubt that together with our Afghan and international partners, we will succeed in Afghanistan."

VOA: standard.2010.05.22

Now you keep on trying and because the reinforcement is intermittent you don't expect it as much and so your behavior will persist across often a huge amount of time.

你会不停的尝试,因为此时的强化是间隔强化,你并不会抱有很高的期望,因此，你的行为,通常会持续相当长的一段时间。

耶鲁公开课 - 心理学导论课程节选

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