This is a normal vector of the same length as n, well, up to sign.

这是与N长度相同的法向量，只是符号不定。

youdao

So if you have some region of space S and you call its boundary surface S and you let n be the normal vector that goes out of the region R.

如果存在一些区域空间,边界为曲面,定义n为指向区域R外的法向量。

youdao

Moreover, corresponding to different filter length N and frequency vector setting modes(traditional symmetry or even symmetry), 4 types of all-phase half-band filters were designed.

并针对不同的滤波器长度N和频率向量的设置（传统对称或偶对称），设计出了4种全相位半带滤波器。

youdao

to the n, every value in the 1 bit vector we looked at last time is either 0 or 1. So it's a binary n number of n bits, 2 to the n.

从2到n，我们上次看到的,位向量的每个值不是0就是,所以它是n，比特的二进制数,从2到。

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