Technology alone won't solve our problems—it's how we apply it with ethics and foresight that matters.

For the eyes of the world now look into space, to the moon and to the planets beyond, and we have vowed that we shall not see it governed by a hostile flag of conquest, but by a banner of freedom and peace.

每一种化学结合完全且仅仅依赖于两种对立的力量，即正电和负电。