persistent

• 形容某人或某事物持续存在或持续发生，尤其指持续时间长或超出一般情况；也形容人坚持不懈、不轻易放弃。

Describes someone or something that continues to exist or happen, especially for a long time or longer than usual.

1. Never-ceasingB2formal

   Continuing to exist or happen without stopping; constant.

   持续不断的

   • The persistent rain caused flooding in the low-lying areas.
   • She suffered from a persistent cough for weeks.
   • His persistent efforts finally paid off.

   同义词constantcontinualcontinuousendlessincessantinterminableperpetualrelentlessunceasingunendingunrelentingunremitting

   反义词intermittentoccasionalsporadictemporarytransient

2. Continually recurring to the mindC1formal

   A thought or idea that keeps coming back, often unwanted.

   挥之不去的

   • A persistent melody kept running through her head all day.
   • He had a persistent feeling that he had forgotten something important.
   • The image of the accident was a persistent memory for years.

   同义词hauntinginsistentintrusivenaggingobsessiverecurrentrecurring

   反义词ephemeralfleetingmomentarypassingtransient

3. Retained; not shedC2formal

   In botany or zoology, referring to parts that remain attached instead of falling off.

   宿存的

   • The plant has persistent leaves that stay green all winter.
   • Some trees have persistent fruit that remains on the branches.
   • The species is known for its persistent calyx.

   同义词enduringlastingpermanentremainingretained

   反义词caducousdeciduous

4. Stubbornly unyieldingB2formal

   Refusing to give up or change one's mind or course of action despite difficulty or opposition.

   执着

   • She was persistent in her demands for a fair trial.
   • The persistent salesman refused to take no for an answer.
   • Despite the setbacks, he remained persistent in his pursuit of the truth.

   同义词determineddoggedintransigentobdurateobstinatepertinaciousresolutestubborntenaciousunyielding

   反义词compliantirresolutewaveringyielding