The mind once enlightened cannot again become dark.
The only way to learn mathematics is to do mathematics.
最好的音乐来自痛苦和真诚。
Collaboration is key—governments, businesses, and communities must work together for sustainable forests.
The night is a great poem, but the stars are its words.
成功不是终点,失败也不是致命的:重要的是继续前进的勇气。