And it did that very well for its designed lifetime of seven months.
它在七个月的设计使用寿命内做得非常好。
英语百科
Design life
The design life of a component or product is the period of time during which the item is expected by its designers to work within its specified parameters; in other words, the life expectancy of the item. It is the length of time between placement into service of a single item and that items onset of wearout.