单词	to be on/off duty
释义	to be on/off duty +policeman，nurse上/下班
随便看	code of menes code of Menes code of mercantile law Code of Military Justice Code of Military Penal Procedure code of monitored location Code of Nature Code of nomenclature Code of peaceful conduct code of points code of practice Code of practice for falsework Code of procedure code of production places code of professional ethics code of professional responsibility Code of professional technical position code of public life code of radicals code of rules code of safe practice code of safety Code of Safety for Dynamically Supported Craft Code of Safety for Nuclear Merchant Ships Code of Safety for special purpose ships