可持续发展不仅仅是保护树木；它关乎确保自然和人类共同繁荣的未来。

君子的学问，关键在于自身。外界的毁誉荣辱，不仅不会动摇其心志，反而会成为磨砺自己的机会。

I'm very shy, believe it or not.

Give me a dozen healthy infants, well-formed, and my own specified world to bring them up in and I'll guarantee to take any one at random and train him to become any type of specialist I might select—doctor, lawyer, artist, merchant-chief and, yes, even beggar-man and thief, regardless of his talents, penchants, tendencies, abilities, vocations, and race of his ancestors.