地质时间不仅漫长，而且其事件的发生是不规则的。
The multiverse is not a theory, but a prediction of certain theories.
The essence of causal inference is to go beyond the data and ask what would happen if we intervene.
健康的国民是一个国家能拥有的最大财富。
我唯一能保证的就是对我的艺术保持诚实。
The mind is to be studied as an end in itself.