未来是一个概念——它只存在于我们的脑海中。

The mathematician does not study pure mathematics because it is useful; he studies it because he delights in it and he delights in it because it is beautiful.

Education is a lamp, but too many never find the switch.

You don’t have to get it perfect, you just have to get it going.

All happiness depends on courage and work.

气候变化不仅是对农业的威胁，更是重塑农业的契机。