ephemeral

• 形容某事物只持续极短的时间，转瞬即逝或短暂无常。

Describes something that lasts for a very short time; fleeting or transient.

1. Short-lived or temporaryC1formal

   Lasting for a very short time; fleeting.

   短暂的

   • The beauty of cherry blossoms is ephemeral.
   • Fame can be ephemeral in the modern world.
   • The ephemeral nature of youth is often romanticized in poetry.

   同义词briefevanescentfleetingfugitivemomentarypassingshort-livedtemporarytransienttransitory

   反义词durableenduringeternaleverlastingimmortallastingpermanentperpetualpersistent

2. Transient in biologyC2formalscientific

   Referring to organisms or phenomena that have a very brief lifespan or duration.

   短暂的

   • Ephemeral plants complete their life cycle in a few weeks.
   • The pond is home to ephemeral insects that live only for a day.
   • Ephemeral algae blooms appear after heavy rains.

   同义词evanescentfleetingmomentaryshort-livedtransienttransitory

   反义词perennialpermanentpersistent

• 名词，指存在时间极短、转瞬即逝的事物或生物，例如寿命很短的昆虫或朝生暮死的生物。

A noun referring to anything that is short-lived or transitory, such as an insect that lives only for a day in its winged form.

1. Short-lived organismC2formal

   A living thing, especially an insect, that exists for a very brief period, often only a day in its adult form.

   短命生物

   • Mayflies are classic ephemerals, living only for a day as adults.
   • The garden was full of ephemerals that bloomed and faded within a week.
   • In the pond, we observed the brief life of an aquatic ephemeral.

   同义词ephemeron