不过话得说回来，没有一桩事是容易的。

积极的情绪拓宽了我们的意识，让我们看到更多的可能性。

The future of medicine lies in understanding chemistry at the molecular level.

"Understanding the immune system is understanding the key to unlocking new cancer therapies."

We make things to remember, and we remember by making things.

It really matters whether people are working on generating clean energy or improving transportation or making the Internet work better and all those things. And small groups of people can have a really huge impact.