Example sentences of "has [vb pp] a crucial role in " in BNC.

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1 The growth of the popular press , which could bring news of the latest entertainment to the breakfast tables of the nation , clearly has played a crucial role in defining sport as part of a commercialized mass culture .
2 The lesson of history is quite simple : animal experimentation has played a crucial role in many major medical advances and it is reasonable to expect that it will continue to do so .
3 The Press has played a crucial role in every story , despite being accused of lying , invention and worse .
4 In this article we will discuss why traditional medicine has played a crucial role in the popular system and examine some of the problems and contradictions communities and health workers have faced in using traditional medicine to revolutionize the health process .
5 Founded in 1954 in Florida , the company has grown to become the world 's second largest chain of its kind and franchising has played a crucial role in this development .
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