life span
US /ˈlaɪfˌspæn/
UK /ˈlaɪfˌspæn/
名词
寿命, 生命周期
the length of time for which a person, animal, or thing exists or functions
示例:
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The average human life span has increased significantly over the past century.
在过去一个世纪里，人类的平均寿命显著增加。
•
Some insects have a very short life span.
有些昆虫的寿命很短。