use of dash

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keannu

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Dec 27, 2010
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Student or Learner
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Korean
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South Korea
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South Korea
I wonder when to use a dash. For supplementary explanation or emphasis? If someone could provide a good material or link for punctuation or a brief explanation here, it would be highly appreciated.

mo3-49
ex)The McDonald's restaurants that are located across the United States - and increasingly, the world - have a significance that goes far beyond the convenience of quick hamburgers, milk shakes, and salads...
 
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