證明的嚴(yán)謹性將數(shù)學(xué)與所有其他科學(xué)區(qū)分開來。
The fight against hunger is a fight for justice.
當(dāng)你專注于做正確的事而非容易的事時，成功自然會隨之而來。
The best ideas often come from listening—to farmers, scientists, and families.