Security staff flagged the email as subversive after it urged employees to overthrow management.

保全人員將那封電子郵件標記為顛覆性內容，因為信中鼓吹員工推翻管理階層。

The airline denied boarding to a passenger linked to a subversive group abroad.

航空公司拒絕一名與海外顛覆組織有關的旅客登機。

Our background checks screen applicants for any history of subversive political activity.

我們的背景調查會篩檢應徵者是否有任何顛覆性政治活動的紀錄。