The discovery of the accelerating expansion of the universe was a complete surprise.

The balance of marine ecosystems is our shared responsibility. Destroying it means destroying our own future.

创新是经济繁荣的核心问题。

城市是生活上演的舞台。

我们的科学力量已经超过了我们的精神力量。我们有导弹，但我们的人类道德方向已经偏离。