您好,成都瑞知英语雅思培训很高兴为您解答疑惑。arangeof与awiderangeof都是只范围大,只是后者强调范围更大。例句:Studentfromawiderangeofbackgroundscometothisschool.Scientistswilldeterminetheresultaccordingtoarangeoftests.awidevarietyof至各种各样的,强调种类多比如:Theyhavefoundawidevarietyofbutterfliesinthatregion.类似的表达还与:awidearrayof,multifarious希望能解答您的疑惑。