Quality is not a concept; it is a reality.
質(zhì)量不是概念；它是一種現(xiàn)實。
求知若饑，虛心若愚。
Democracy is the worst form of government except for all those other forms that have been tried from time to time.
學(xué)習(xí)是系統(tǒng)中產(chǎn)生的任何變化，這種變化或多或少會永久性地改變其適應(yīng)環(huán)境的能力。