So, over the course of time this could have a very substantial impact on the community.

所以,这种病毒在一段时间内,会对当地社会产生持续的影响

耶鲁公开课 - 生物医学工程探索课程节选

but over an extended period of time.

而是持续一段时间的事情。

I'm ~ing 课堂 - SpeakingMax英语口语达人

Well, the first thing that I noticed, they have been going wrong for a while.

据我观察，首先，这种状态其实已经持续了一段时间了。

普林斯顿公开课 - 国际座谈会课程节选

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

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