| 单词 | life expectancy |
| 释义 | life expectancyˌlife exˈpectancy noun [countable] 1science, biology the length of time that a person or animal is expected to live: an animal with an average life expectancy of four years2the length of time that something is expected to continue to work, be useful, etc.: CDs have a life expectancy of at least 20 years.3technical the age that someone will probably live to, based on things such as current age, whether or not someone smokes cigarettes, the type of job he or she does, etc., used by insurance companies to work out the risk of insuring someone |
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