1N-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
The dormant period is another stage in the life cycle of the plant. [+ of]
休眠期是这种植物生活史中的另一个阶段。
2N-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
...the stages of the familial and economic life cycle.
家庭及经济生活周期的各个阶段
Each new product would have a relatively long life cycle.