当随机化不可行时,匹配方法可以是一个强大的工具。
The truth is a mirror which fell from the hand of God and broke into pieces. Everybody took a piece of it, and they looked at it and thought they had the truth.
The pursuit of mathematical truth is a never-ending adventure.
Writing is a way of keeping the past alive.
Leadership in our industry means having the courage to invest in unproven green technologies.