每一块皮革都讲述一个故事；我们的工作是让它成为一个好故事。
Every piece of leather tells a story; our job is to make it a good one.
The evening is the time of day when the light is most beautiful, but it’s also the time when it starts to fade.
相关系数的可能误差不是可以从第一原理推导出来的东西，而是必须通过经验找到的。