1、Some critics deride the group as self-appointed food police.
一些批評人士嘲諷這個組織為“自封的食品警察”。

2、She has become the self-appointed guardian of the nation’s conscience.
她成了自封的國家良知守衛(wèi)。

3、a self-appointed guardian of public morals.
自我標榜的公共道德守護者。

self-appointed翻譯