可持续性不是一种选择,而是我们对下一代的责任。
The essence of mathematics lies in its freedom.
I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit.
沉默是上帝的语言,而我们诗人则是它的诠释者。