play an important role

基本解释

However, today a president could play an important role in restoring stability to monetary policy and the value of the dollar.
不过，今天一位总统能够在重塑货币政策和美元价值的稳定方面扮演一个重要的角色。
Tiny releases of glutamate play an important role in the body, but any excess can be dangerous - especially to the brain and nervous system.
微量的谷氨酸释放在身体扮演一个重要角色，但是任何一点过量都是危险的，特别是对脑子和神经系统。
But while we may not recall our nocturnal visions, scientists increasingly believe our dreams play an important role in memory and learning.
但是尽管我们回想不起夜间梦景，科学家日益相信我们的梦对我们的记忆和学习起到重要作用。

Sharks play an important role in the food chain.
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
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

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