The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.

农业的进步不仅要以产量衡量，还要以长期的环境影响来衡量。

激发生命，让生命自由发展，这是教育者的首要任务。

"The truth is rarely pure and never simple."

向更清洁能源的过渡是不可避免的；那些抗拒的人将被抛在后面。

The rocks we extract today must leave a legacy we can be proud of tomorrow.