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:
经济学特别是宏观经济学中说的投资是耐用资本品如厂房设备的生产，而平常说的“投资”是指购买资产如股票，这和经济学中的投资不同，为了区分，这种投资被称为金融投资。
我们以大大小小的方式阻碍自己，缺乏自信，不举手，在应该向前一步的时候退缩。
Making games should return to the essence, fun is the ultimate truth.
Complexity and contradiction are not problems to be solved, but opportunities to be explored.
The most powerful tool for improving decisions is feedback.
我知道你是来杀我的。开枪吧，懦夫，你只是要杀一个人。