longevity /lɑnˈʤɛvəti/ noun Learner's definition of LONGEVITY
[noncount]
1
a : long life : the fact of living for many years长寿；长命 2
: the length of time that something or someone lasts or continues（物品的）耐用期限，寿命 -
The longevity of a car's tires depends on how the car is driven.汽车轮胎的使用年限取决于驾驶方式。
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She's a talented athlete, but many people have doubts about her longevity. [=about how long her athletic career will last]她是个天才运动员，但很多人对她的运动生涯能否持久表示怀疑。
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They're trying to increase the product's longevity.他们正在设法提高产品的使用寿命。