风险是损失的可能性,而不确定性是缺乏确定性。
You never know what worse luck your bad luck has saved you from.
我们几乎无法避免这样的推论:光是由同一种介质的横向波动组成的,这种介质也是电和磁现象的原因。
"Thought exists to serve action, not merely to reflect reality."