教育者必须是一位心理学家，以便理解儿童。

I believe in pink. I believe that laughing is the best calorie burner. I believe in kissing, kissing a lot. I believe in being strong when everything seems to be going wrong. I believe that happy girls are the prettiest girls. I believe that tomorrow is another day and I believe in miracles.

过去是幽灵，未来是梦，我们拥有的只有现在。

你必须愿意犯错；重要的是不要一遍又一遍地犯同样的错误。

煤炭的真实成本必须既考虑其即时价值，也考虑其对社区和生态系统的长期影响。