追求知识是一场没有终点的旅程。

As long as you have stayed in a swan's egg, it doesn't matter if you were born in a duck yard.

我不害怕表明立场。大家来握住我的手，我们将一起走过这条路，经历风雨，无论天气冷暖。

自然和历史是地理知识的两个重要来源。

写作是面对过去的一种方式。