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Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
生物从受精卵到成熟、繁殖和死亡所经历的一系列阶段。
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生物从受精卵到成熟、繁殖和死亡所经历的一系列阶段。；产品或系统的使用寿命；个人或群体在社会中的发展历程。；生活周期；[计] 生存期
The course of stages through which an organism passes from fertilized zygote until maturity, reproduction, and death.
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生物从受精卵到成熟、繁殖和死亡所经历的一系列阶段。
The course of stages through which an organism passes from fertilized zygote until maturity, reproduction, and death.
产品或系统的使用寿命；个人或群体在社会中的发展历程。
The useful life of a product or system; the developmental history of an individual or group in society.
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Collins 词频等级为 1，建议结合例句记忆，而不是只背中文释义。
页面下方列出了常见词形变化。学习时注意它们在句子中的语法位置。
Dictionary facts from DICTIONARY_API_DEV, ECDICT, WIKTIONARY.