life cycles

• 疲劳寿命循环数

life cycles的英文翻译是什么意思，词典释义与在线翻译：

英英释义

名词 life cycle:

1. a series of stages through which an organism passes between recurrences of a primary stage

2. the course of developmental changes in an organism from fertilized zygote to maturity when another zygote can be produced