A guardian is someone who has been legally appointed to take charge of the affairs of another person, for example a child or someone who is mentally ill.
双语例句
例：
Destiny's legal guardian was her grandmother.
德斯蒂妮的法定监护人是她的祖母。
2.?[C 可数名词] 保护者
The guardian of something is someone who defends and protects it.
双语例句
例：
an institution acting as the guardian of democracy in Europe.