You know, when your sadness when, can like to watch setting sun.
你知道,当你悲伤的时候,就会喜欢看落日了。
"There is no greater agony than bearing an untold story inside you."
The test of true innovation is whether it makes life better for ordinary people.
数学直觉常常指导算法的发展,但确保其正确性和效率的是严格的证明。