用心栽花、施肥、灌溉,花却总是不开;无意间将柳条插在地上,却长成了郁郁葱葱的柳树。
The concept of NP-completeness has provided a powerful tool for understanding the complexity of problems.
世界是一面伟大的镜子,我们是其中的倒影。
Learn how to learn from those you disagree with, or even offend you. See if you can find the truth in what they believe.
成为人类就是变得脆弱。