play an important role

基本解釋

However, today a president could play an important role in restoring stability to monetary policy and the value of the dollar.
不過，今天一位總統(tǒng)能夠在重塑貨幣政策和美元價值的穩(wěn)定方面扮演一個重要的角色。
Tiny releases of glutamate play an important role in the body, but any excess can be dangerous - especially to the brain and nervous system.
微量的谷氨酸釋放在身體扮演一個重要角色，但是任何一點過量都是危險的，特別是對腦子和神經(jīng)系統(tǒng)。
But while we may not recall our nocturnal visions, scientists increasingly believe our dreams play an important role in memory and learning.
但是盡管我們回想不起夜間夢景，科學(xué)家日益相信我們的夢對我們的記憶和學(xué)習(xí)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.
諸如習(xí)慣化，經(jīng)典條件作用，操作性條件作用之類的機制,都是真實存在的;,這些機制都能得到科學(xué)的研究;,它們在動物的生活里起到了重要的作用,或許在我們?nèi)祟惖纳钪?也同樣起到了重要的作用。
耶魯公開課 - 心理學(xué)導(dǎo)論課程節(jié)選
I think that America has an important role to play to have the standards increased.
我覺得美國在提高標準方面扮演著重要的角色。
愛護小朋友 - SpeakingMax英語口語達人

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