The paper industry has a responsibility to lead the way in environmental stewardship.
数学的本质在于它的自由。
我们都受到过去幽灵的困扰,但由我们决定是让它们困扰我们还是引导我们。
创造就是活两次。
哲学的任务不是解决矛盾,而是使它们可见。
The only thing that bothers me about my buildings is that they are not good enough.