The Environmental Film Festival in Washington plays an important role in helping increase understanding about a subject that is important for people all over the world.

VOA: special.2009.03.25

The respiratory system plays an important role in maintaining our internal environment at the proper level of oxygen, by bringing the right amount in.

呼吸系统的重要性在于,通过向体内输入适量的氧气,维持人体内环境中的氧平衡

耶鲁公开课 - 生物医学工程探索课程节选

I think that America has an important role to play to have the standards increased.

我觉得美国在提高标准方面扮演着重要的角色。

爱护小朋友 - SpeakingMax英语口语达人

The natural environment plays an important role in his documentaries and other movies.

VOA: special.2009.03.25

And I came to hope about ten years later, you had an important role in that, that I thought you may try to put the two together.

我希望十年后，当你们有一定生活阅历了，你们就可以把这两部影片对比着来看。

麻省理工公开课 - 电影哲学课程节选

Katharine Graham played an important role in supporting women in the workforce.

VOA: special.2009.04.26

I think we have an important role for economic, financial education.

我想我们必须对经济及金融学教育,提起重视。

耶鲁公开课 - 金融市场课程节选

But music played an important role in her childhood.

VOA: special.2009.04.19

Mechanisms like habituation, classical conditioning and operant conditioning are real; they can be scientifically studied; and they play an important role in the lives of animals and probably an important role in human lives as well.

诸如习惯化，经典条件作用，操作性条件作用之类的机制,都是真实存在的;,这些机制都能得到科学的研究;,它们在动物的生活里起到了重要的作用,或许在我们人类的生活中,也同样起到了重要的作用。

耶鲁公开课 - 心理学导论课程节选

Sharks play an important role in the food chain.

VOA: special.2009.04.03

And in his role here as a mute, as an infant, Christ is serving, I think, an important function for Milton.

作为一个哑巴，一个婴儿，基督对，弥尔顿起了很重要的作用。

耶鲁公开课 - 弥尔顿课程节选

Using his understanding of complex geometric forms, Lang has played an important role in origami's evolution.

VOA: standard.2010.03.17

I took my role to sniff that out, and to make sure the president heard 2 and 4 on an important issue, and was able to make the decision himself.

我的作用就是发现这些，保证总统可以听到2和4这两个观点4,在一些重要问题上，然后他能自己做决定。

普林斯顿公开课 - 国际座谈会课程节选

She is famous for her origami cranes, which once played an important role in Japanese culture.

VOA: standard.2010.03.17

He would remain a virgin in order to prepare for and to maintain this incredibly important role as an epic poet.

他想保持自己的童贞,为了准备和保持作为史诗诗人这个无比重要的角色。

耶鲁公开课 - 弥尔顿课程节选

"And we think that this methodology can very much be used to capture the bunch of genes that are playing an important role in one's susceptibility to that disease."

VOA: standard.2010.07.14