释义：想要夺取什么，必先给予一些什么。

The pace of change demands agility—both in thought and action.

The computer is a fantastic tool if you know how to use it.

不要因为结束而哭泣，微笑吧，为你的曾经拥有。

In the examination of the parts of animals, I have diligently endeavored to arrive at the truth.

领导力意味着今天做出艰难的决定，为更美好的明天铺平道路。