The idea of a multiverse is a natural consequence of the inflationary universe model.

A people without children would face a hopeless future; a country without trees would face a future with even less hope.

林业的效率并不意味着砍伐更多，而是让每一棵树都有价值。

There is no bad whiskey. There are only some whiskeys that aren't as good as others.

We choose to go to the moon in this decade and do the other things, not because they are easy, but because they are hard, because that goal will serve to organize and measure the best of our energies and skills, because that challenge is one that we are willing to accept, one we are unwilling to postpone, and one which we intend to win, and the others, too.