You could look at what it does but babies are not very coordinated or skilled so you need to use clever methods.

你可以观察婴儿,但婴儿不怎么配合,或者说他们的言语技能并不熟练,所以你必须要用精巧的方法才能做到

耶鲁公开课 - 心理学导论课程节选

He was the first generation to go to college, grew up in the farms, and as such, he was very skilled with machining.

他是家里面第一个大学生，出生在农场，他很精通机械。

麻省理工公开课 - 固态化学导论课程节选

One could easily, for example, differentiate between a red cell and a neuron, but a skilled biologist who's looked at many, many different cells could differentiate between different types of neurons.

普通人可以很轻易的,分辨出神经元和红细胞,然而一个训练有素的生物学家,辨识过许多不同细胞之后,能够分辨出不同种类的神经元

耶鲁公开课 - 生物医学工程探索课程节选

Plus it makes it, as I talked about last time, much easier to think about distributing the vaccine around the world because shots require skilled medical personnel, whereas, an oral vaccine could be self-administered.

而且,这会使得,就像我上次谈到的,这会使得疫苗更容易在世界范围内分发,因为注射需要专业医疗人员,但是,口服疫苗自己就可以服用

耶鲁公开课 - 生物医学工程探索课程节选