The meaning of buff that we do know about is one that describes a person.

VOA: special.2009.05.17

I don't know why they make such a big deal out of the person landing on the moon.

我不理解人类登月,有什么大不了的。

哈佛公开课 - 幸福课课程节选

where you kind of get a strict, you know, this person is social, this person is studious.

高中的时候划分得很严格，比如说，这个人爱社交，那个人爱学习。

学习和交际都重要 - SpeakingMax英语口语达人

Know what your traditional reactions are. A person that knows their drugs and the effects of their drugs are in fact the best security against fakes."

VOA: special.2010.03.01

There is a kind of cultural myth around the stranger, the person you don't know, who you will--who you fall in love with.

可能对陌生人有一种文化迷思，你不认识他，却将要爱上他。

耶鲁公开课 - 心理学导论课程节选

I know who they are connected to who I might know. You have a much richer way of connecting with this person than you otherwise would."

VOA: special.2009.09.14

When you look at the risk of consequences from metabolic syndrome in the population, you have to know a person's race to some extent to understand how high their risk really is.

如果想要考察某人群,患代谢综合征的风险,就要知道一定的种族信息,这样才能较准确地知道他们的患病风险度

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

"I can't think of a person that I know of in the world that used their celebrity status for a greater good than what Manute Bol did.

VOA: special.2010.07.05

A person of character." Oh, I don't know.

高尚的人格吗,我也不知道

耶鲁公开课 - 美国内战与重建课程节选

Yeah, I mean, it's been...I've been... Saed I feel very fortunate to meet Saed ... You know, first of all ,he is a great guy, and a wonderful person to spend time with.

恩，我的意思是。,我很高兴能遇到。,他是非常好的人，跟他在一起很高兴。

普林斯顿公开课 - 人性课程节选

You know, and within a very short amount of time be able to do a lot of things that that person may never be able to do.

在短时间内,可以做很多,那些只有丰富经验的人做不到的事。

斯坦福公开课 - 扎克伯格谈Facebook创业过程课程节选

Second thing, we started talking about the periodic table and I believe that it's a hallmark of any educated person in the 21st century who is technically literate to know the periodic table by heart.

第二点，我们之前讨论过元素周期表,我相信这是个标志性的特征,对于那些在21世纪里,用心去学习,元素周期表的人来说。

麻省理工公开课 - 固态化学导论课程节选

If you go to the dining hall you know, the portions-- one person serves themselves this much of a food and another serves themselves another, and then when you go to a restaurant there are variations on how much you get served of things, and so it's very hard to estimate portions for people.

如果你去食堂,摄入量是指,一个人吃了自己的那部分食物,或其他人吃的他们的那一部分,当你去餐厅,每次吃多少是变化的,因此估算每个人的摄入量是很难的

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选