EXTEMPORIZE

 

I extemporized a solution: I offered them extra credit if they would give me their phones for nine days and write about living without them.

 

 

 

EXTEMPORIZE

   즉흥적으로 하다

  

  I'd lost my notes and had to extemporize.

  To 'extemporize' or ad lib is basically the same as improvising.

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