Problem solving is a search through a space of possible solutions.
解决问题是在可能的解决方案空间中搜索。
人生就像一场逆行的旅程，我也是其中的一个过客。
Always keep a written record of your trades. This will help you learn from your mistakes and successes.
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.
"The city never sleeps, and neither does its darkness."