cordon sanitaire
/kɔːˌdɒnsænɪˈteə/noun
(pl. cordons sanitaires. 读音同)
1- a guarded line preventing anyone from leaving an area infected by a disease and thus spreading it（传染病流行地区的）防疫（封锁）线。
1.1
- a measure designed to prevent communication or the spread of undesirable influences防线; 防御措施：
these rules help to reinforce the cordon sanitaire around Whitehall.
这些规定有助于加强白厅周围的防御。
词源
mid 19th cent.: French, from cordon 'line, border' （see CORDON） + sanitaire 'sanitary'.