Without mathematics you don’t have science.

Without mathematics you don’t have science.

Without mathematics you don’t have science.

Without mathematics you don’t have science.

Without mathematics you don’t have science.

拖延的本质来源于内心的恐惧。这个恐惧有两层含义：任务本身的艰巨性；害怕失败带来的结果。

“克己复礼为仁”

重要的统计学概念

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