随着时间的推移，他们开始明白，一个给定的数表示一个比它前面的数大1的数量。

With time, they start to understand that a given number represents a quantity greater by one than the number coming before it.

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树形模型是表示一个语言家族的发展并显示两种或更多语言的密切相关程度的一种便捷方式。

The tree model is a convenient way of representing the development of a language family and of showing how closely related two of more languages are.

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在图2中，每个箭头表示一个接口。

In Figure 2, each arrowhead represents an interface.

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And I am going to superscript it molecular orbital, and this upper one, to indicate that it's antibonding, has the asterisk.

我将给分子轨道加上标，这个上标，表示反键轨道，有一个星号。

麻省理工公开课 - 固态化学导论课程节选

If I want to create a set or a sequence representing these things, I simply insert into that list.

如果我想创建一个集合,或者一个序列表示这些东西，我只要简单的把它插入列表中。

麻省理工公开课 - 计算机科学及编程导论课程节选

Instead if we want this pointer to represent the address of something in as much as it points at that address let's just draw an arrow.

如果我们想要让这个指针表示,数据的地址，它指向的地址,我用一个箭头表示。

哈佛公开课 - 计算机科学课程节选