任何实验的价值和效用都取决于材料是否适合其使用的目的。
The value and utility of any experiment are determined by the fitness of the material to the purpose for which it is used.
The best fertilizer is the farmer's shadow on the field.
Success is not final, failure is not fatal: It is the courage to continue that counts.
The only way to understand painting is to look at it for a long time.
Because thought implies judgement, and because we are all paranoid enough to take judgement to be negative, it is constitutionally suspect in the bedroom.