单词	life buoy
释义	life buoyˈlife ˌbuoy noun [countable] a large ring that is made of material that floats, which you throw to someone who has fallen in the water, to prevent him or her from drowning
随便看	roughshod roulette round roundabout round character rounded roundhouse roundly roundness round robin round-shouldered round steak round-table round-the-clock round trip round-trip roundup rouse rousing Rousseau, Henri Rousseau, Jean-Jacques roust roustabout rout route

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