Mrs. March knew that experience was an excellent teacher, and when it was possible she left her children to learn alone the lessons which she would gladly have made easier, if they had not objected to taking advice as much as they did salts and senna.

我们必须对变革的速度保持现实态度。即使我们投资于低碳解决方案，世界在未来几十年仍将需要石油和天然气。

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

你必须相信你的想法，并愿意在众多挑战中坚持下去。