【释义】农业和商业进行交易，使农业和商业都能得到利益，促进经济的全面发展。

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

If one only wished to be happy, this could be easily accomplished; but we wish to be happier than other people, and this is always difficult, for we believe others to be happier than they are.

我不相信后悔，我相信从中吸取教训。

机器学习是让计算机在没有明确编程的情况下行动的科学。