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1·He played a major role in setting up the system.

他在建立这个系统的过程中扮演了主要的角色。《牛津词典》

2·The U.N. would play a major role in monitoring a ceasefire.

联合国将在监督停火方面发挥主要作用。《柯林斯英汉双解大词典》

3·The media play a major role in influencing people's opinions.

媒体在影响舆论方面发挥着重要作用。《牛津词典》

4·He played a major role in rehabilitating Magritte as an artist.

他对恢复玛格里特艺术家的名誉起了重要的作用。《牛津词典》

5·The government played a major role in promoting Confucian philosophy.

该政府在推行儒家哲学上担当了一个重要角色。《柯林斯英汉双解大词典》

6·He was amazingly inventive and resourceful, and played a major role in my career.

他极具创造力又足智多谋，在我的职业生涯中起了重要的作用。《柯林斯英汉双解大词典》

7·Her first major role was in Martin Scorsese's Goodfellas and she followed this with a part in Spike Lee's Jungle Fever.

她首先在马丁·斯柯席斯的《好家伙》中演了重要角色，随后又演了斯派克·李的《丛林热》。《柯林斯英汉双解大词典》

8·The food industry plays a major role in fighting obesity.

食品工业在对抗肥胖方面起着重要作用。

9·They may have played a major role in the rise of Teotihuacán.

他们可能在特奥蒂瓦坎的崛起中扮演了重要的角色。

10·Parents still have a major role to play, but now it is more delicate.

父母仍然扮演着重要的角色，但现在这个角色更加微妙了。