"The city’s poor are like the roots of a tree; unseen, but essential to its life."

过去从未死去，它甚至还没有过去。

学习不仅仅是记忆的问题；它是创造的问题。

The behaviorist asks: Why don't we make what we can observe the real field of psychology?

农业的未来取决于我们跨国界适应和合作的能力。