life cy·cle
noun/ˈlaɪf saɪkl/
/ˈlaɪf saɪkl/
- (biology) the series of forms into which a living thing changes as it develops
生命周期，生活周期（生物发展过程的系列变形） - the life cycle of the butterfly
蝴蝶的生命周期
- the life cycle of the butterfly
- the period of time during which something, for example a product, is developed and used
生命周期，寿命（产品等从开发到使用完毕的一段时间）