1 N-COUNT [usually with poss] (生物的)生活史,生活周期 The life cycle of an animal or plant is the series of changes and developments that it passes through from the beginning of its life until its death. (生物的)生活史,生活周期
2 N-COUNT (想法、产品、组织等的)存在周期 The life cycle of something such as an idea, product, or organization is the series of developments that take place in it from its beginning until the end of its usefulness. (想法、产品、组织等的)存在周期
View usage for:All yearsLast 10 yearsLast 50 yearsLast 100 yearsLast 300 years