悲伤不是一条线，让你无限远离失去。它是一个圆，你会一次又一次回到同一个地方。
"Grief is not a line, carrying you infinitely further from loss. It is a circle, and you come back, again and again, to the same place."
统计推断的理论不是数学的一个分支，而是在不确定性下进行推理的科学。