useful life

基本解释

Then, the system can be safely repaired and refactored throughout its useful life.
这样，系统即可在其有用的生命周期中安全地进行修复和重构。
Apart from poisoning the catalytic converter and reducing its useful life, zinc and phosphorus mixed in with the exhaust gases add to the motor industry’s emissions woes.
除了对催化式排气净化器造成不良影响减少其使用寿命外，锌磷还同废气形成混合物加入到汽车行业废气污染的行列。
Carbon dioxide, once released, stays in the atmosphere and continues to have a warming effect for about a century, and industrial infrastructure is built to have a useful life of several decades.
二氧化碳一旦被释放出来，就会留在大气层中，在一个世纪左右都会持续产生温室效应，但工业设施的使用寿命才有几十年。

"When those products are at the end of their useful life, how are they going to be broken down?
I can't tell you in a useful way what it is that your goals in life should be or whatever.
我也不能告诉你,你人生目标应该是什么
耶鲁公开课 - 博弈论课程节选
And you're telling them about what's useful in life, what you need to do in life.
你在告诉他们生活中什么是有用的，什么是你们必须做的。
It's important 课堂 - SpeakingMax英语口语达人

E-waste is electrical and electronic equipment that is at the end of its useful life.
UNESCO: MEDIA SERVICES

使用寿命
In recent years, laser surface modification of dies of ductile iron has been an important method to improve its wear resistance and useful life.
对球墨铸铁冲压模具的激光表面处理已成为改善其耐磨性、提高使用寿命的重要方法。
有效寿命