nightshirt

详细解释:n. (男用)衬衫式长睡衣

英语解释：

名词 nightshirt:

nightclothes worn by men

详细解释：

night.shirt

n.（名词）
A long, loose shirt worn in bed, especially by men.
男用睡衣：特指男用的、晚上睡觉时穿的又长又松的衬衫