你必须写那本想要被写出来的书。如果这本书对成年人来说太难，那么你就为孩子们写。

宁静的心灵是健康的源泉。

We kid ourselves if we think that the ratio of procedure to data in an active data-base system can be made arbitrarily small or even kept small.

The dialogue between space and material is the essence of architecture.

In the context of computational learning, the concept of 'probably approximately correct' (PAC) learning provides a framework for understanding the efficiency and feasibility of learning algorithms.