详细解释:n. 潜望镜(镜头)
【化】 潜望镜
词型变化：
形容词:periscopic英语解释：
名词 periscope:
an optical instrument that provides a view of an otherwise obstructed field详细解释：
per.i.scope
n.（名词）Any of various tubular optical instruments that contain reflecting elements, such as mirrors and prisms, to permit observation from a position displaced from a direct line of sight.潜望镜：一种管状镜，包含折射物，如镜子和棱镜，用以观察与视线不在同一直线上的位置
【引伸】
per.iscop.ic