Sustainability must be the cornerstone of modern quarry operations, not an afterthought.

学习新编程语言的唯一方法是用它编写程序。

I don't let anyone define me.

The most important political development of the modern era is the rise of the modern state.

写作是一种爱的行为，是对居住在我们体内并定义我们的词语的完全奉献。