unsophisticated

/ˌʌn.səˈfɪs.tə.keɪ.t̬ɪd/

形容词

不复杂的，简单的；涉世不深的；单纯的
I could tell by his unsophisticated outfit that he wasn't very familiar with formal events.
我可以通过他不太复杂的服装看出，他对正式场合并不太熟悉。