This is the 3328th most frequent Chinese word.
墨西哥
Mexico.
In this sentence, '墨西哥' is used as a proper noun representing the country Mexico.
我的朋友来自墨西哥。
My friend is from Mexico.
Here '墨西哥' functions as an adjective modifying the noun '饮食' (cuisine), indicating the origin of the cuisine as Mexican.
墨西哥的饮食非常独特。
Mexican cuisine is very distinctive.
'墨西哥' refers to the country as a subject of learning or discussion in this context.