一個群體的性格和命運，往往由其最低劣的成員決定。
The character and destiny of a group are often determined by its inferior elements.
數(shù)學(xué)的美在于它能夠以最優(yōu)雅的方式描述宇宙。
You take delight not in a city’s seven or seventy wonders, but in the answer it gives to a question of yours.
The only valid data for psychology are the reports of trained observers.