今天种植的每一棵树都是留给后代的遗产。
真正的美国发现还在我们面前。我们精神、我们人民、我们强大而不朽的土地的真正实现,尚未到来。
Understanding the genetic code has opened up new avenues for medical research and biotechnology.
The best way to find yourself is to lose yourself in the service of others.
The meaning of life is to find your gift. The purpose of life is to give it away.