单词	booby hatch
释义	booby hatch noun plural booby hatches 1 : a raised framework with a sliding cover over a small hatch on a ship 2 informal, often offensive : a psychiatric hospital —usually used with the Word History First Known Use 1784, in the meaning defined at sense 1
随便看	arc lamp arc lamps arc minute arc of action arc of approach arc of contact arc of Lowitz arc of meridian arc of recess arc of recession arc secant arc second arc sine arc sines arc spectrum arc tangent arc tangents arc triangulation arc weld arc welder arc welding arc-back arc-boutant arc-over arca

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