研究者们强调当我们问人们是否快乐时，如果我们不知道受访者通过“快乐”这个词表达的是什么，那么他们的回答就什么也没告诉我们。
Researchers emphasize that when we ask people if they are happy the answers tell us nothing if we don't know what our respondents mean by "happy."
如果一个设计师对告诉与他一起工作的人他们做了不好的决策这事觉得很为难，那么在一开始，这个设计师就处在了很不利的位置。
Designers who have a hard time telling the person they are working with that they are making a bad decision are putting themselves at an early disadvantage.
但是作为一名坐在病人面前的医生，如果我想告诉他们补充维生素B非常安全，而且很便宜，那么这时我们的研究成果就非常有说法力了。
But as a clinician sitting in front of a patient I would say vitamin B supplements are fairly safe, they are not expensive and what we have found here is extremely convincing.
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