数学是一门艺术,作为艺术家,你必须对自己诚实。
我对任何人的赞美或责备都不在意,我只是跟随自己的感觉。
I am the only person in the world I should like to know thoroughly; but I don’t see any chance of it just at present.
The most sustainable forest is one that remains standing while meeting human needs.