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Insufficient demand.
出自-2016年6月阅读原文
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The inconvenient fact about most books, to which Google has arguably paid insufficient attention, is that they are protected by copyright.
出自-2011年12月阅读原文
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Some parents who withdraw their children from the schools in favor of home schooling have an inadequate educational background and insufficient formal training to provide a satisfactory education for their children.
出自-2013年12月听力原文
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Perhaps worse, the detrimental effects of an unhealthy diet and insufficient exercise are not limited to your body.
2019年12月六级真题（第一套）阅读 Section A
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The expert review also found insufficient evidence to recommend any drugs or dietary supplements that could prevent or slow cognitive decline.
2016年6月六级真题（第二套）听力 Section C