我不是数学的英雄。我甚至没有那么成功;这就是为什么我不希望每个人都看着我。
I am not a hero of mathematics. I'm not even that successful; that is why I don't want to have everybody looking at me.
Safety isn't a department - it's a culture that starts at the very top.
Sustainability isn't an option—it's our responsibility to future generations.