补充：nationality有国籍的意思.
World English Dictionary

ethnic or ethnical (ˈɛθnɪk)
—adj
1.
relating to or characteristic of a human group having racial, religious, linguistic, and certain other traits in common

2.
relating to the classification of mankind into groups, esp on the basis of racial characteristics

3.
denoting or deriving from the cultural traditions of a group of people: the ethnic dances of Slovakia
4.
characteristic of another culture: the ethnic look; ethnic food
从definition上看来,用ethnicity还是比较好哦