Gerteis argues that, since slavery in the South precluded individual autonomy and the free pursuit of material gain, major Northern reformers opposed it as early as the 1830s.

格泰斯认为，由于南方的奴隶制妨碍了个人自治和对物质利益的自由追求，北方的主要改革者早在19世纪30年代就反对奴隶制。

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Each volume in the set explores a wide range of material, explains the basic concepts of major applications of digital systems, and discusses the influences they have on everyday life.

系列中的每卷探索了广泛的材料，解释数字系统的主要应用的基本概念，并讨论了它们对日常生活的影响。

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Apart from the access it offers to major foreign newspapers, the Internet is not an ideal source of reading material for adolescents.

互联网除了能让人读到国外主要报纸之外，其实并不是青少年理想的阅读材料的来源。

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"This material doesn't just reveal abuses, this material describes the past six years of war, every major attack that resulted in someone being detained or someone being killed."

VOA: special.2010.07.31

And foreign-based companies, as well, that trade in the U.S. have to file with the SEC basic information and major material developments.

FORBES: Fourth Of July Message: How To Win As An Independent-Minded Investor

Silicon, the major raw material used in the manufacture of solar panels, requires an energy-intensive process to turn it into solar-grade silicon.

FORBES: U.S. Solar Manufacturer to U.S. Taxpayers: Drop Dead

He said that 300 tonnes of hardcore material were being laid on major in-routes and car parks in preparation for Sunday.

BBC: F1 pledge to beat weather