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词汇	periscope
释义	per·i·scope AHD[pĕrʹĭ-skōp'] D.J.[ˈperɪˌskəʊp]K.K.[ˈpɛrɪˌskop]n.（名词）periscopeLight enters the top lens of a periscope, reflects off a mirror set at a 45 degree angle, travels down the periscope tube, and reflects off a second mirror, also set at a 45 degree angle. Light that reflects off the second mirror exits through the bottom lens and into the eye of the user. 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 Related Forms继承用法per'iscopʹic AHD[-skŏpʹĭk] 或 per'i·scopʹi·cal [-ĭ-kəl] （形容词）
随便看	quantum theory Quapaw Quapaws Qu'Appelle quar. quarantine quarantined quarantines quarantining quark quarks quark star Quarles quarrel quarrel quarreled quarreling quarrelled quarrelling quarrels quarrelsome quarrelsome quarried quarries quarry

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