How To Use Bob up In A Sentence

• I dropped the bottle into the sea and watched it bob up to the surface a moment later.
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• I dropped the bottle into the sea and watched it bob up to the surface a moment later.
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• Most of us have seen pictures of people who jump from high bridges tied to a bungee cord that allows them to plummet and then bob up and down like a yo-yo.
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• They bob up for air by the hundreds, each with a quick gulp - nose and eyes above the opaque water - then a plop back under.
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• One one topical site, MPs’ heads bob up and down in a virtual House of Commons and you are invited to splat them with an egg before they disappear.
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