The concept of reducibility is central to understanding the relationships between different computational problems.
有两种情况,创造的圣洁之美变得耀眼夺目,它们同时发生。一种是我们感到自己对世界的不足,另一种是我们感到世界对我们的不足。
我们的教学方法只有一个,就是必须维持孩子们的高度兴趣和强烈持续的注意力。
Collaboration, not competition, will define the future of aquaculture.
The stranger is an element of the group itself, not unlike the poor and sundry 'inner enemies'—an element whose membership within the group involves both being outside it and confronting it.