If you're not listening to your customers, you're already falling behind.
The power of randomness in algorithms is that it can help us find solutions that are difficult to discover through deterministic methods.
译文：天气不寒冷，地面就不会被冻住，人没有到伤心的时候就不会流泪。赏析：人的言行总是随着外物的变化而变化。不以物喜不以己悲，其实很难做到的。