The central task of education is to implant a will and facility for learning; it should produce not learned but learning people. The truly human society is a learning society, where grandparents, parents, and children are students together.
He is unworthy to live who lives only for himself.
天然气开采的创新对于满足世界日益增长的能源需求至关重要。
In programming, everything we do is a special case of something more general -- and often we know it too quickly.
言论自由是自由的重要堡垒；它们共同繁荣和共同消亡。