The key is to set realistic customer expectations, and then not to just meet them, but to exceed them—preferably in unexpected and helpful ways.
朗兰兹对应不仅仅是一个定理，而是未来发现的指导原则。
万物都存在于心中，心中充满道理，充塞宇宙的也无非是这个理。
I'm not perfect, but I'm trying.