After you have read and recited the entire chapter, write questions in the margins for those points you have highlighted or underlined.

阅读整个章节并复述完之后，在空白处对下划线和高光标记过的重点提些问题并写下来。

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In every sector, innovative tech companies make their way into the value chain, focus on the most strategic point (usually client or user relationship), collect data, and leverage it to siphon off the profit margins from entire industries.

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But Merck-Medco's margins remained paper-thin even as its revenues grew 12-fold, crimping the margins of the entire company.

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Dr Pritchard and colleagues looked through six years of data to assess the behaviour of the ice along the entire margins of the two continents.

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