详细解释:n. 两小时换班的值班, 夜班
英语解释：
名词 dogwatch:
either of two short watches: from 4-6 pm or 6-8 pm详细解释：
dog.watch
n.（名词）Nautical Either of two short periods of watch duty, from 4 to 'p.m. or ' to 8 p.m. 【航海】 二时班：下午 4时到'时或 下午 '时到8时的两个值班时间之一 A late night shift.夜班
来源：Probably from dog-sleep [a light or interrupted sleep] 可能源自 dog-sleep [一段浅睡或被打断的睡眠]