n.

1. 阐述；说明；解说[U][C]
   This is a clear exposition of the theory of evolution.

   这是对进化论的清晰的阐述。

2. 展览会；博览会[C]
   They are going to hold an international exposition.

   他们打算召开一次国际博览会。

3. 说明文[C]

n.

1. a comprehensive description and explanation of a theory.
2. a large public exhibition of art or trade goods.
3. Music  the part of a movement, especially in sonata form, in which the principal themes are first presented.
4. archaic public exposure.