Life long time陈弦
life-time reactivity反应度寿命
life-time infinite无限寿命
technical life-time技术寿命
metastable life-time亚稳态寿命
bubble life-time空泡生存周期
target life-time靶寿命
life-time一生;平生;寿命使用期限
The presented method can be easily used in engineering for MTTF evaluation of large complex system, where limited testing data of unit life time is required.
解决了有限样本条件下，大型复杂系统平均寿命评定问题，对工程中大型复杂系统平均寿命评定具有重要应用价值。
参考来源 - 期刊学术社区The thesis comprises four chapters. The first chapter makes a brief introduction on his family background and his life time, with an emphasis on his experience of being an official and a teacher after his seclusion.
本文共四章,第一章简单介绍朱珔的家世和生平,重点在其仕宦和归隐之后的任教经历。
参考来源 - 朱珔论考The result shows that RSM has high reaction activity,good strength stability,better anti-hydration ability and long life time under the operation condition.
结果表明,RSM型催化剂在工况条件下具有优良的活性、稳定性和较长的使用寿命。
参考来源 - RSM型耐硫CO变换催化剂性能评价N-COUNT（可数名词） A lifetime is the length of time that someone is alive. 一生
During my lifetime I haven't got around to much travelling.
我一生中没有旅行过多少。