life span noun
plural life spans
plural life spans
Learner's definition of LIFE SPAN
[count]
: the amount of time that a person or animal actually lives（人或动物的）寿命 —
often used figuratively常用作比喻 -
Recharging can extend the life span of a battery.充电可以延长电池寿命。
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the life span of a building/appliance建筑/家用电器的使用期限
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the life span of a controversy争议的存在期