因果关系的阶梯有三个梯级：观察、行动和想象。

Profit and purpose can coexist. A successful business must also be a force for good.

With a library you are free, not confined by temporary political climates. It is the most democratic of institutions because no one - but no one at all - can tell you what to read and when and how.

CRISPR的未来是光明的，我相信它将继续彻底改变医学和农业。