The important thing in life is to have a great aim，and the determination to attain it.

如果我能影响那位应该主持所有孩子洗礼的善良仙女，我会要求她给世界上每个孩子的礼物是一种永不磨灭的惊奇感，使之持续一生。

The concept of NP-completeness has provided a powerful tool for understanding the complexity of computational problems.

声音可以像任何物理结构一样塑造空间。