dissident

异议人士、持不同政见者多指政治

Several dissidents were jailed for criticizing the government online.

好几名异议人士因在网路上批评政府而入狱。

反对者、唱反调的人

A few dissidents in the party refused to back the new policy.

党内少数反对者拒绝支持这项新政策。

持异议的、反对的

The magazine published essays by dissident writers in exile.

那本杂志刊登了流亡海外持异议作家的文章。