zhanghaolin

我觉得应该把第三段与第四段的第一句话连起来看，或者把第三段和第四段联系起来分析，会比较容易明白第三段的作用。

第四段第一句话是Clark refutes the extremes of the constructivists by both theoretical and empirical arguments.说明第三段的观点不是对TD理论的正确解释，而是一种不正确的“极端”解释。所以，第三段的内容并未与文章中的观点相矛盾，而是在说为什么SC错误看待了TD——因为SC对TD的看法是TD把技术脱离于社会之外。

再看第四段，实际上就是讲Clark对这种极端看法的纠正，说TD不是独立于社会的，而是相结合的。
-Attempts to reduce the meaning of technology to cold, hard metal are bound to fail, for machinery (50)  is just scrap unless it is organized functionally and supported by appropriate systems of operation and maintenance.
-Some changes Clark attributes to the particular way management and labor unions negotiated the introduction of the technology, whereas others are seen as arising from the (65)  capabilities and nature of the technology itself.