Innovation in mining technology is essential to meet the world's energy demands.

The real tragedy of the poor is that they can afford nothing but self-denial.

外交的任务是延长决策的时间。

The worst pain a man can suffer is to have insight into much and power over nothing.

Happiness is not a right; it is a rare and precious exception.

一个故事应该有开头、中间和结尾——但不一定按这个顺序。