心理学理论的价值是由其实用性衡量的。
The worth of a psychological theory is measured by its usefulness.
介导疼痛的分子非常古老,揭示了这种感觉在进化中的深远根源。
A novel is an impression, not an argument; it is an impression of life.
树叶的低语比董事会的辩论更有智慧。