Stephen lay watching the Great Bear; Elfride was regarding a monotonous parallelogram of window blind.

史蒂芬躺在那里看着大熊。 Elfride 正在考虑一个单调的平行四百叶窗。

He drew parallelogram and parabola up to par.

他画平行四抛物线都是达到标准的。

The servants cut our bread into cones, cylinders, parallelograms, and several other mathematical figures.

仆人把我们的面包切成圆锥体、圆柱体、平行四其他几种学图。

Where before you had a nice rectangular-looking book, now you have more of a … parallelogram.

以前，这本书是长方的。 在它更像一个平行四。

The kinds of things you need to learn in seventh grade math, sure, they're hard: ratios, decimals, the area of a parallelogram.

比率，小，算平行四的面积。

Take the parallelogram defined by the 1st basis factor I had, and the mystery input vector X-Y.

取由第一个基因子定义的平行四 以及未知的输入向量X-Y。

Look at the parallelogram we defined earlier, which encodes the excordinate of the mystery input vector spanned by that vector.

看看我们之前定义的平行四 它编码了神秘输入向量由该向量张成的横坐标。

Well, as you apply some sort of matrix transformation, the areas of these parallelograms, well, they don't stay the same.

当你进行某种矩阵变换时 这些平行四的面积 它们不会保持不变。

So the area of that parallelogram is a sort of screwy, roundabout way to describe the vector's Y cordon.

所以平行四的面积是一种扭曲的 迂回的方式来描述矢量的Y线。

At least, if you think of I had as, in some sense, being the 1st out of these two vectors defining the parallelogram.

至少 如果你把它看做 在某种意义上 是这两个向量中的第一个定义平行四。

Its length equals the area of the parallelogram defined by vn W.

它的长度等于用vnw定义的平行四的面积。

That way, a vector with a negative Y coordinate, I would correspond to a negative area for this parallelogram.

这样 一个Y坐标为负的向量 就对应了这个平行四的负面积。

The cross product of VNW, written with the X shaped multiplication symbol, is the area of this parallelogram.

VNW的叉乘 用X乘法符号表示 就是这个平行四的面积。

Sure enough, there's a miniscule gap between the triangles and trapezoids, forming a parallelogram that stretches the entire length of the board and accounts for the missing square.

果然，三角梯之间有一个微小的间隙，成了一个平行四，延伸了整个板的长度并弥补了缺失的正方。

Just as before, we're still going to consider the parallelogram defined by the two vectors that were crossing together.

就像以前一样 我们仍然考虑平行四由两个相交的向量定义。

We'll start in two dimensions. If you have two vectors V and W, think about the parallelogram that they span out.

我们从二维开始 如果有两个向量VW 想想它们张成的平行四。

After the transformation, that square gets turned into the parallelogram that we care about.

变换之后 这个正方就变成了我们关心的平行四。

The area of this parallelogram is the base one times the height perpendicular to that base, which is the Y coordinate of that input vector.

这个平行四的面积等于底1乘以垂直于底的高 也就是输入向量的Y坐标。

The parallelogram that they define in this simple example is actually a square.

这个简单例子中定义的平行四实际上是一个正方。

Well, this is the transformed version of the parallelogram we were looking at earlier, the one whose area was the Y coordinate of the mystery input vector.

这是我们之前看到的平行四的变换后的版本 它的面积是未知输入向量的Y坐标。