So think of x as a vector of 0's and 1's.
可以把x看成是一个0和1的向量。
Such input can be viewed as a vector: <X1, X2, ...
这样的输入可以看成一个向量:<X 1, X 2, ...
Listing 17 contains a list of items as a Vector data type, which is the return parameter.
清单17包含一系列项目,作为Vector数据类型,它是返回参数。
The advantage of introducing that guy is that if you like, I can now write an equation for the acceleration as a vector.
引入它的好处是,如果你愿意的话,我可以把加速度写成矢量形式
So think of x as a vector of 0's and 1's.
可以把x看成是一个0和1的向量。
If you want to write it as a vector equation, you want to write it as v square over r minus-- I want to say that it's pointing in the direction toward the center.
如果要写出矢量方程,就应该写成 -v^2 / r,也就是说,方向就向圆心
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