ordinariness       
noun [ U ] uk/ˈɔː.dən.əri.nəs/ us/ˌɔːr.dənˈer.i.nəs/
 平凡
the quality of not being different or special or unexpected in any way
  She expected him to act like a star, but she was surprised at his ordinariness. 她以为他的举止会像个明星,然而却惊讶于他的平凡。 
 the dull ordinariness of her life
 See: ordinary
 - More examples
- It was not an unusual face, but its very ordinariness moved him.
- She was grateful for the sheer ordinariness of it all.
- It is her ordinariness that makes her achievements all the more outstanding.