The right of a nation to kill a tyrant in case of necessity can never be doubted until the right of a tyrant to kill a nation has been proved.

你想要的每一样东西都在恐惧的另一边。

Technological leadership is the foundation of petrochemical enterprises, and we must continuously increase R&D investment.

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。

哲学的任务是使世界更加人性化。