im·per·ma·nent /-nənt/
  (a.)暫時的,非永久的
  Im·per·ma·nent a. Not permanent.
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  impermanent
       adj 1: not permanent; not lasting; "politics is an impermanent
              factor of life"- James Thurber; "impermanent palm
              cottages"; "a temperary arrangement"; "temporary
              housing" [syn: temporary] [ant: permanent]
       2: existing or enduring for a limited time only