投资清洁煤炭技术不是开支，而是对我们未来的投资。
A mathematician is a device for turning coffee into theorems.
Sustainability is no longer an option—it's a business imperative.
说出口的，就是结束且完成的。
The greatest enemy of a trader is hope.
发现的喜悦是推动数学家前进的动力。