It is introduced as a building block for security labels.

它被引入作为安全标签的一个构件。

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An activity is a building block designed for use in a flow.

活动(activity)是设计用于流中的构建块。

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The amino acid aspartic acid is a building block of proteins throughout the body.

天冬氨酸氨基酸是全身蛋白质的构造基石。

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Well, recall that very basic building block we introduced 1 last week which allowed you to grab a random number between 1 and 10 or 1 or a hundred.

好吧，让我们先回想一下上周介绍过的,能产生1~10之间，或者1~100之间随机数的1,基本构建块。

哈佛公开课 - 计算机科学课程节选

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