物理学的美丽不仅在于它提供的答案,还在于它揭示的奥秘。
The existence of a legal system is a matter of fact, not of morality.
The first duty of a revolutionary is to be educated.
数据抽象是将特定数据集简化为整体的简化表示。
What is broken can sometimes hold more meaning than what is whole.