No president who performs his duties faithfully and conscientiously can have any leisure.
Success is a lousy teacher. It seduces smart people into thinking they can't lose.
They had said that the city was a paradise, but I found it a hell.
在机器学习中,目标不仅仅是拟合数据,而是找到一个能够捕捉数据潜在结构的模型。