I mean, you may not understand it with algebra before but some of these sorts of pictures have you seen before?
我是说可能代数部分你没看懂,但你们以前见过类似的图像吧
I am going to do it first pictorially and then I will write the algebra. What happens here?
下来我会做绘画工作,并写下一些代数,这儿怎么了?
All I did was, I did a little bit of calculus, a little bit of algebra, and then I drew the thing.
我只不过是稍微用了点微积分,做了点代数运算,然后就画出来了
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