那我们怎么得到这单位矢量呢？

Now, how do we get this unit vector?

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图1是矢量数据和属性表的示例。

Figure 1 provides an example of vector data and an attribute table.

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我断言，这个位置矢量在平面上。

Well, I claim that the position vector is in the plane.

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假设有一矢量，在三维空间中。

I have a vector which is in three-dimensional space.

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现在，这里是，物体的矢量中心。

And this, now, is the position vector of the center of mass.

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这是我们第一次这样写一个矢量。

Now, it's our first time writing this kind of thing with a vector.

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首先，为使用矢量图的指针编写代码。

First, code a needle using vector drawing.

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接下来要处理的是矢量图形。

The next thing to play with is vector graphics.

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如果矢量背对你，你看到的是一个叉。

If you look at the vector from behind, you see a cross.

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这就得到6个数字,和3个单位矢量。

So these six are numbers and these are the unit vectors.

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因此，路径的概念对矢量作图非常重要。

Therefore, a concept of path is fundamental to vector drawings.

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我们都见过…这就是矢量。

We all have seen... this is a vector.

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我的力朝这个方向，矢量。

And I applied the torque in this direction, the vector.

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就是我们所说的速度矢量。

OK, that's what we call the velocity vector.

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来看看位置矢量的改变。

And, we look at how the position vector changes.

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这意味着，我们也许需要一个矢量来表示它。

That means actually we should use a vector maybe to think about this.

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记住它，这是个矢量。

Remember this-- this is a vector.

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总动量为，两者的矢量和，也就是这个东西。

The net momentum is the vectorial sum of these two, which is this.

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矢量c的方向是什么？

What is the direction of the vector?

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好的，所以让我来做矢量图。

Ok, so let me take the column picture.

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如果有两个矢量。

Suppose you have two vectors.

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就是这个矢量。

This is that vector.

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我们用黑体形式表示矢量。

We use boldface type for vectors.

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我没写成矢量。

I don't write them down as vectors.

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时间门之多向矢量并不只是唯一通往其他实相的方式。

Time Gate Vectors are not the only means to access other realities.

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本文求解矢量场的方法是严格的和标准的。

This method for solving vector fields is exact and standard.

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这个新的教程将改变你使用矢量图形的方式。

This new tutorial will change the way you use vector graphics.

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这个新的教程将改变你使用矢量图形的方式。

This new tutorial will change the way you use vector graphics.

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