石油的真正成本不仅仅是每桶的价格，还包括环境和社会影响。

If you are ready to give up everything else and study the whole history and background of the market and all the principal companies whose stocks are on the board as carefully as a medical student studies anatomy—if you can do all that and in addition you have the cool nerves of a gambler, the sixth sense of a clairvoyant and the courage of a lion, you have a ghost of a chance.

The study of exoplanets is a journey of discovery, filled with surprises and challenges that keep us motivated.