In economics, small changes in rules can lead to large changes in outcomes.
估计问题的性质与检验统计假设的问题不同。
解释:河流川泽中有污水,深山草野中藏有瘴气,美玉也有微小的瑕疵。
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."