过去从未死去，它甚至还未过去。
"The past is a puzzle, and the historian is the person who tries to put the pieces together."
The world has the technology - either available or well advanced in the research pipeline - to feed on a sustainable basis a population of 10 billion people.
唯一的进步方法就是不断去做。
Science is an adventure into the unknown, each discovery a new understanding of nature.
