Economics is the study of how societies use scarce resources to produce valuable goods and services and distribute them among different individuals. If we think about the definitions, we find two key ideas that run through all of economics:

The world is full of people whose notion of a satisfactory future is, in fact, a return to the idealised past.

The best time to work on your marriage is before you have one.

The dots are my way of communicating with the universe.

晶体管是一种等待被发明的设备。