Why is marking up a book indispensable to reading?

为什么在阅读过程中在书上做标记是必不可少的呢？

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But it's not just a question of marking up the price in between.

但这并不只是一个提高差价的问题。

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Marking up the service model using the SCA Transformation profile.

使用SCA转换配置文件标记服务模型。

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The president meets Wednesday with Senate Democrats, as the budget committee there and in the House of Representatives begin "marking up" budget resolutions, which form the framework for appropriations and other important legislation.

VOA: standard.2009.03.24

He was motionless, all but for one finger that moved up and down in front of his face as if he were marking time with it.

他一动也不动，除了一根手指在他的面前上下摆动,好像在用它标记时间。

耶鲁公开课 - 1945年后的美国小说课程节选

The market voted its approval by marking up Panenergy's stock fivefold over five years.

FORBES: Trading places

The market had voted its approval by marking up Panenergy's stock fivefold over five years.

FORBES: Trading Places

Mr. Schmitz tends to use his slender-nibbed fountain pens for tasks like marking up a spreadsheet.

WSJ: Jan-Patrick Schmitz of Montblanc on Choosing the Right Pen