The invention of the cotton gin was a mere accident; I was then young and very poor, and it was a great object with me to realize something from it.
轧棉机的发明纯属偶然;那时我还很年轻,非常贫穷,对我来说从中实现一些价值是一个重要的目标。
页岩行业的整合是不可避免的。
一个词的意义不是心智实体,而是社会实践。