To be a poet is to have a soul so quick to discern, that no shade of quality escapes it.

We are survival machines—robot vehicles blindly programmed to preserve the selfish molecules known as genes.

Never underestimate the power of a single idea to transform the world.

教育是可持续林业实践的基础。

轧棉机的发明是一系列无法预见的 circumstances 的结果。