The future of coal lies not in its quantity but in how cleanly and efficiently we can use it.

All the choir of heaven and furniture of earth - in a word， all those bodies which compose the frame of the world - have not any subsistence without a mind.

粮食安全是一个需要地方行动的全球性问题。

艺术家必须同时是哲学家、科学家和诗人。

爱是一个战场，但它是一个值得为之奋斗的战场。