数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
Known for all that you were during this brief stay.How sad it seems to leave this earth without those you love the most ever really knowing who you were.
我唯一真正快乐的时候是在水里的时候。
可持续发展不是一种选择,而是我们对后代的责任。