n.告密者;通知者;
例句:
Alex Vandervoort had authorized him to employ an informer.
亚历克斯·范德沃特同意他雇用一名暗探.
The informer has done dirt to her.
告密者说了她很多坏话.
An informer denounced him to the police.
检举人已向警方告发他.