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In page Continental Europe:

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Derivatively, the adjective continental refers to the social practices or fashion of continental Europe, or at least specific parts of it. Examples include breakfast, topless sunbathing and, historically, long-range driving (before Britain had motorways) often known as Grand Touring.[citation needed] Remaining differences as seen in electrical plugs, the use of left-hand traffic, and for the United Kingdom, the continued use of certain imperial units alongside the metric units (which have long since displaced customary units in continental Europe) have reinforced the idea.[6][7]