The teaching of taking course as unit is the basic teaching form of distance education.

以课程为单元组织教学是远程教育的基本教学形式。

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The basic unit of user experience on the Web is, of course, the page, which we represent as a simple rectangle.

网络中用户交互的最基本单元是页面，因此我们采用一个矩形符号来表示页面。

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Now, if you are worried about the fact that actually if your unit time is too long then of course things might start changing as it flows.

如果你有点小担心，担心单位时间取得过长的话，流体的情况会发生变化。

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Occasionally, you'll find you need to cancel out units, because, of course, you're always doing unit analysis as you solve your problems, and sometimes you'll need to convert joules to kilogram meters square per second squared.

偶然地，你会发现需要消除单位，因为在解题时,经常要做单位分析，所以有时候需要把,焦耳换做,一千克乘以米的平方除以秒的平方。

麻省理工公开课 - 化学原理课程节选

Somewhere in the course of flipping the screen around, as the unit converts from a notebook to a tablet, Windows 7 disappears and (for now) a beta copy of Windows 8 comes up with its Metro interface showing for a great tablet experience.

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Anyone selling ad unit faces declining prices and, of course, increased competition as competitors try to maintain revenues.

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