The term "lifetime" refers to the duration of time that an individual organism, object, or entity exists or functions. It can be used in various contexts, such as:
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Biological Context: Refers to the span of time an individual living organism lives from birth until death. For example, the lifetime of a fruit fly might be a few weeks, while that of a turtle could be several decades.
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Product Context: In reference to products, lifetime can denote the period during which a product is expected to function effectively or be useful before it deteriorates or becomes obsolete.
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Personal Context: It can also relate to the experiences, achievements, or memories accumulated over a person's life.
Overall, "lifetime" encapsulates the concept of time related to existence or functionality.