不设防监狱

【法】 open prison

不的英语翻译：

nay; no; non-; nope; not; without
【医】 a-; non-; un-

设防的英语翻译：

fortify; set up defences

监狱的英语翻译：

prison; jail; chokey; gaol; Job's pound; pokey
【法】 bridewell; clink; gaol; iron house; jail; limbo; Marshalsea
minion of the law; prison; prison house; quod; slammer; toll booth