B You can say a minus B is a plus minus B and we know how to add vectors and we know what minus B is.

可以把A减b看作a加负，我们既知道怎么做加法，也知道负b是什么。

youdao

I It takes I, which is in some sense 1 the length of those vectors, minus 1, because of the way Python works.

还有i，某种意义上，是那些向量的长度减，减1由于Python的工作方式。

youdao

I It takes I, which is in some sense 1 the length of those vectors, minus 1, because of the way Python works.

还有i，某种意义上，是那些向量的长度减，减1由于Python的工作方式。

youdao