Old minds are like old horses; you must exercise them if you wish to keep them in working order.
老脑筋就像老马；如果你想保持它们的工作状态，就必须锻炼它们。
启发式研究揭示了我们是怎样做出快速、高效的决策的，但也揭示了这些捷径如何导致系统性错误。
The theory of economic development is the study of how the economic system generates the forces which incessantly transform it.
理论地理学是空间科学的女王。
Self-love， then， is a necessary principle of action.