Anything where you're actually keeping track of something like a score that's having a variable that you increment -- plus, plus, or decrement, minus, minus, using the appropriate puzzle piece could certainly be compelling.

你需要保存像分数这样的事物时,你就需要一个变量,它可以自加，++，或者自减,要使用正确的拼图。

哈佛公开课 - 计算机科学课程节选

The only way that somebody can overweight Ford Motor Company in the market is to have somebody have a counter position where they underweight Ford Motor Company; only one of those is going to be right.

要增持福特公司股票,唯一途径就是找一个,想要减持福特股票的人,两方中只有一方能做出正确的证券选择

耶鲁公开课 - 金融市场课程节选