life cycle

1. N-COUNT 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. (动植物的) 生命周期

...a plant that completes its life cycle in a single season. …在一个季节内完成其生命周期的一种植物。

2. N-COUNT 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. (思想、产品或机构等的) 使用周期

Each new product would have a relatively long life cycle. 每一种新产品都会有一个相对较长的使用周期。