Technology can revolutionize mining, but only if we have the courage to embrace it.

农民是我们经济中唯一以零售价购买一切、以批发价出售一切，并双向支付运费的人。

Efficient market theory is correct in that there are no gross inefficiencies， but we look at anomalies that may be small in size and brief in time.

解释：对别人没有恩德，却想有求于人，这是罪过。