政策辩论应以严格的实证分析为基础。
Policy debates should be grounded in rigorous empirical analysis.
When I look at the world I'm pessimistic, but when I look at people I am optimistic.
The best stories are those that cannot be summarized.
Innovation in coal technology is just as important as innovation in any other energy sector.
唱歌不在于完美，而在于情感和联系。
"The world is full of poetry. The air is living with its spirit; and the waves dance to the music of its melodies, and sparkle in its brightness."