It's unbelievable! Through reading this story, I feel that we should live strong no matter how much pain we are in.
VOA: special.2010.04.23
Perhaps it's clear to you that no matter how your axes are oriented, when you ask, "How long is this arrow?"
这应该是比较显然的,无论坐标轴指向哪里,当你问,"这个矢量有多长"
There's nothing profound about this, other than the understanding that the details of how you set these things up can matter a lot.
只是说我们要理解,一开始设定时候的值,会对结果有很大影响。
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