生产的最终条件是生产条件的再生产。

Every tree planted today is a legacy for generations we will never meet.

The anarchic nature of the international system compels states to prioritize their own survival above all else.

To innovate in computer science, one must first master the fundamentals.

天空没有留下鸟的痕迹，但我已飞过。

"We are all in the gutter, but some of us are looking at the stars."

科学是我们解开生命之谜的工具。

我不想成为榜样。我想成为一个真实的人。