The only relevant test of the validity of a hypothesis is comparison of its predictions with experience.
检验假设有效性的唯一相关标准是其预测与经验的比较。
化学是逻辑的诗,也是诗的逻辑。
生气时,先数到十再说话;如果非常生气,就数到一百。
Complexity is not a barrier to understanding, but a challenge to be overcome.