I remember my first exposure way back in the 60s was a photo of the Biafra famine you remember in the civil war in Nigeria.

我记得我第一次感受到贫困，是在60年代,那是一张关于尼日利亚饥荒的照片,你应该记得，是尼日利亚内战期间。

普林斯顿公开课 - 人性课程节选

You could probably find some antigens that don't follow exactly this behavior, but in general, this is the kind of behavior you would see on first exposure to an antigen or vaccine, called the primary exposure, and on subsequent exposure to an antigen or vaccine called the boost.

可能你也会发现,一些抗原并不完全遵循这种模式,但通常来说,在你首次接触一种抗原或疫苗时,都能观察到这种模式,它被称为初次免疫,而接下来的,再次接触抗原或是疫苗被称为增强免疫

耶鲁公开课 - 生物医学工程探索课程节选

So, these two facts taken together, thin slices and the power of first impressions, means that just by a brief exposure to somebody it shapes so much of how you're going to think about them in the future.

综合考虑这两方面，薄片效应和第一印象的影响，意味着只需要短暂地接触对方,就能决定,你以后对他们有什么看法。

耶鲁公开课 - 心理学导论课程节选

For those of you who are not from MIT, - all MIT students have to take two semesters of physics all undergraduate students. For most students this is the most rigorous exposure to physics they've ever had In the first semester of physics, they study what I think was the basic nonunion mechanics.

如果你们不是麻省理工的学生，要知道麻省理工的所有学生,所有本科生---都得学两个学期的物理,对大多数学生来说,这是他们接受的最严格的物理学习,第一个学期他们学一些,基础力学。

麻省理工公开课 - 媒体、教育、市场课程节选

One thing I do want you to remember is that IgM class antibodies are the antibodies produced on first exposure.

我希望你们记住的一点是,IgM类抗体是人体在,第一次接触抗原时产生

耶鲁公开课 - 生物医学工程探索课程节选

Most of them are of the class IgM; IgM antibodies are produced on first exposure.

其中大部分抗体都属于IgM,IgM在机体首次接触抗原时产生的

耶鲁公开课 - 生物医学工程探索课程节选

Why do you think IgM are produced on first exposure?

为什么IgM是在初次免疫期间产生

耶鲁公开课 - 生物医学工程探索课程节选