氦气球因拉高东西而闻名，一组工程师之中一人说道，但他也是把报废的卫星拖回地球的一个好方法。

Helium balloons are known for pulling things up, but they could be a great way to drag defunct satellites down to Earth, a team of engineers says.

youdao

全寿命周期控制，就是对工程项目规划决策、设计、施工、生产运营直到报废的各个阶段进行全盘考虑，进行综合造价控制。

Life cycle cost control, that is, decisions on project planning, design, construction, manufacturing operations in all stages comprehensive cost control.

youdao

工程报废情况较突出。

The condition of damage of the projects was severe.

youdao