The biggest reward is not financial gain, but the ability to impact people's lives in a positive way.
The invention of the cotton gin was the result of necessity and observation.
我对自己的工作如此着迷,以至于几乎等不及早上起床就开始工作。
在采矿业,我们必须在经济增长和环境管理之间取得平衡,以创造长期价值。