periscope
US /ˈper.ɪ.skoʊp/
UK /ˈper.ɪ.skoʊp/
名词
1.
潜望镜
a long, vertical tube containing a set of mirrors that gives you a view of what is above you when you look through the bottom of the tube:
示例:
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Periscopes are used in submarines to allow you to look above the surface of the water.
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