"You have to dream, you have to have a vision, and you have to set a goal for yourself that might even scare you a little because sometimes that seems far beyond your reach."

Science is a wonderful thing if one does not have to earn one's living at it.

理解一个句子意味着理解一种语言。

地球是一个具有特定组织的宇宙个体，一个独特的实体。