But I hope to doing the next couple of lectures is giving you an idea what this class is about so that you can decide whether or not it is for you.

但希望几堂课后，你能有个大概印象,让你决定这门课是否适合你。

哈佛公开课 - 幸福课课程节选

It's like you have a social security number or other ID number, which positively--there might be another person with the same name as you, God forbid, but you at least have your own number, which is guaranteed to be unique to you.

就好比社保号,或者其他身份号码,很有可能,有另外一个人,和你重名,希望这不要发生,但你至少有唯一的识别号,用于区分自己和他人

耶鲁公开课 - 金融市场课程节选