世界上没有什么比笑声和好心情更具感染力了。
The past is always tense, the future perfect.
The best songs come from real emotions and experiences.
出自汉·桓宽《盐铁论·后刑》。锄去田里有害的杂草，禾苗就可以健康地生长；惩罚为非作歹的恶人，百姓就会感到喜悦。
One of the first things taught in introductory statistics textbooks is that correlation is not causation. It is also one of the first things forgotten.