But we know this, in particular, from a series of studies that would be unethical if they were to be done today.

我们知道这点，是通过一系列的实验，出于人道精神,这些实验现在就不能做了。

耶鲁公开课 - 心理学导论课程节选

That's unethical behavior because it -if you keep trading too much, then you cannot possibly make money.

这是不道德的行为,因为,如果你一直过度交易,那你基本不可能赚到钱

耶鲁公开课 - 金融市场课程节选