一只眼睛的人可以用来看水平仪，有毒的石头可以用来治疗痈疽。

Pressure makes diamonds.

Childhood is the first and last frontier of literature.

You forget what you want to remember, and you remember what you want to forget.

忽视环境影响的生产力指标只是会计把戏，而非真正的进步。