如果我们现在不采取行动，下一代将继承一个资源更少、挑战更大的世界。
If we don’t act now, the next generation will inherit a world with fewer resources and greater challenges.
【释义】经过多年努力也还不够，一旦毁坏却十分彻底。
The interplay between analysis and algebra is the driving force behind many breakthroughs in number theory.
每一幅画都是一次旅程，你永远不知道它会带你去哪里。