My words in her mind: cold polished stones sinking through a quagmire.

The advancement of mathematics is due to those who are driven not by the desire for application but by the joy of discovery.

现代采石必须将地质学的智慧与工程的创新相结合。

生活是花朵，爱情是花蜜。

世界需要能源，但它比以往任何时候都更需要负责任的能源。