1·After he took courses in useful life skills, he recently moved into his own flat.
在学习了有用的生活技能课程后，他最近搬进了自己的公寓。
2·Some products can be recycled at the end of their useful life.
有些产品过了有效使用年限后是可以回收再利用的。
—— 《牛津词典》
3·If you are food, do you foster useful life?
如果你是一颗粮食，你是否哺育了有用的生命？
4·During his useful life he often felt he was useless.
在他大有作为的一生中他老是感到自己无用。
5·During ghis useful life he often felt he was useless.
在他大有作为的一生中他老是感到自己无用。
6·If that happened to a detector, its useful life would be short.
如果这样的话，那这个检测装置的寿命就会很短。
7·The march would consume half of the useful life of the vehicle.
此次长途跋涉将过于损耗车辆的寿命。
8·The march would consume half of the useful life of the vehicle .
此次长途跋涉将过于损耗车辆的寿命。
9·Susan began to believe that she would lead a useful life finally.
苏珊开始相信，她最终会成为一个有用的人生活下去。
10·The useful life of the equipment depend mainly on the maintainability.
设备的使用寿命主要取决于维修保养条件。