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day fly

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Ephemeral \E*phem"er*al\, a.
   1. Beginning and ending in a day; existing only, or no longer
      than, a day; diurnal; as, an ephemeral flower.

   2. Short-lived; existing or continuing for a short time only.
      ``Ephemeral popularity.'' --V. Knox.

            Sentences not of ephemeral, but of eternal,
            efficacy.                             --Sir J.
                                                  Stephen.

   {Ephemeral fly} (Zo["o]l.), one of a group of neuropterous
      insects, belonging to the genus {Ephemera} and many allied
      genera, which live in the adult or winged state only for a
      short time. The larv[ae] are aquatic; -- called also {day
      fly} and {May fly}.
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