That statement says, get the value of x, which is this link, and give z a pointer to the same place.
这个声明的意思是,取得x的值,也就是连接指向的值,然后给z赋予一个指向同样位置的指针。
That's a choice, and that choice turns out to be very interesting and really important, because if you connect these two points together, you get a straight line that has to intercept the x-axis at some point.
在这一选择下,我们会发现一件非常有趣,而且极其重要的事,当你把这两点用直线连接起来,你会发现这条直线,将与x轴在某点相交。
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