一叶浮萍归大海,人生何处不相逢?
释义:一片浮萍顺水漂流,终飘向大海,人生又哪里不能再次重逢呢?
In the world of mathematics, imagination is more important than knowledge.
Life is like a mirror, if you frown at it, it frowns back; if you smile, it returns the greeting.
    ——杜抨击当时的国民政府。