Sustainability must be the cornerstone of modern quarry operations, not an afterthought.
可持续性必须是现代采石场运营的基石，而非事后考虑。
The beauty of mathematics is that it is both an art and a science.
我从不把自己当作明星，我只是一个热爱唱歌的人。
What we do today will determine the climate for centuries to come.
We can talk about a happening in three main ways: by describing it， by recounting its history， by telling a story about it.