Investing in renewable energy and cleaner technologies is part of our commitment to a sustainable future.

I never guess. It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts.

The realities are that, you know, as a black man, Barack can get shot going to the gas station.

我不是一个完美的人，我从未声称自己是。

经济理论提供工具，但现实世界的测试会完善它们。