单词 | 潜望镜 |
释义 | 〔periscope〕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 |
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