Monetary policy is a powerful tool, but it cannot solve all economic problems; it must be complemented by sound fiscal policies.
货币政策是一个强大的工具，但它不能解决所有的经济问题；它必须辅以健全的财政政策。
The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.
生命的意义在于发现你的天赋，生活的目的是把它奉献出去。