Innovation is not a choice, but a necessity for survival.

Farmers are the original environmentalists; their daily decisions shape our landscapes more than any policy ever could.

I touched the pain in my chest. It was the place where she had one or two times in my hair.

财富和权力是多余的，对于那些能享受简单快乐的人来说。

轧棉机的发明是一系列无法预见的 circumstances 的结果。

To do mathematics is to engage in an act of discovery and conjecture, intuition and inspiration.