公民身份

例句：

1. 1.He is a citizen of the United States.
   他是美国的公民。
2. 2. The government is trying to improve its citizens' welfare.
   政府正试图改善其公民的福利。
3. 3. She was born in this country and is now a citizen.
   她出生在这个国家，现在是一名公民。