A prototypical example of something is a first example from which all later forms can be developed.

They designed prototypical schools that could ensure students would meet state standards, then calculated the costs of those schools. 他们先设计了学校的原型，保证教出来的学生能符合政府要求，然后计算这些学校的成本。

relating to a particular type of person or thing that is seen as very typical

He seems like a prototypical Republican. 他看上去像是一个典型的共和党人。