lifetime

• 名词，指人或动物从出生到死亡的一生，也指某事物存在、运转或发挥作用的整个持续时间。

A noun referring to the duration or period of time that a person, animal, or object exists or functions.

1. Duration of lifeA2formal

   The period of time during which a person or living thing is alive.

   寿命

   • She achieved many things in her lifetime.
   • The invention changed the world within his lifetime.
   • A lifetime of experience cannot be replaced.

   同义词existencelifelifespan

2. Very long timeA2informal

   An extremely long period, often used hyperbolically.

   很长时间

   • I haven't seen you in a lifetime!
   • It felt like a lifetime waiting for the results.
   • This project took a lifetime to complete.

   同义词aeonageeoneternity

   反义词flashinstantmomentsecond

3. Duration of existenceB1formal

   The period during which something exists or functions.

   寿命

   • The warranty covers the lifetime of the product.
   • The building has a lifetime of about 100 years.
   • The software's lifetime ended with the last update.

   同义词durationexistencelifelifespanspanterm