Not only are evolutionary throwbacks possible, they sometimes play an important role in the forward march of evolution.

进化返祖现象不仅有可能，有时还在进化的发展中扮演重要的角色。

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Pottery used to play an important role in the daily lives of Chinese people.

陶器在中国人的日常生活中扮演着重要的角色。

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They play a very important role in managing schools.

他们在学校管理中起着非常重要的作用。

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The film shows the important role these bees play in the world's food chain.

VOA: special.2009.03.25

So the link of the conflict will play a stronger role in making the humanitarian issues more important.

因而冲突的纽带将会发挥更大的作用,使得人道主义问题更加重要。

普林斯顿公开课 - 人性课程节选

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

Vigilance plays a role, but Shur suggested another factor may also play an important role.

CNN: Inside the witness protection program

The role of states and state law in the online poker landscape will likely play an important role in 2011, especially since Senator Harry Reid was unable to push through legislation late in 2010 that would have federally regulated online poker.

FORBES: Feds Quietly Freeze Online Poker Cash in Washington

Protected areas play an important role in conserving the biodiversity and thus sustaining rural livelihoods.

UNESCO: NATURAL SCIENCES